A dangerous animal commonly found around the Iliac Bay. It attacks with its very long incisors and front paws. Nobility sometimes train them as house pets.
Sabre Cats are large, powerful, and fast cats that have evolved two dangerously sharp front teeth. They are very dangerous and will attack wildlife and people without hesitation, often ignoring the former in favor of the latter. They're found in the wilds of Skyrim. Khajiit legend states that the sabre cats were once the Rhojiit, Khajiit warriors who fought for Alkosh at the Battle of Red Mountain. Snowy sabre cats are found in the frosty high elevations of Skyrim, and vale sabre cats can be seen in the Forgotten Vale.
Salamanders are large, dangerous amphibians found in tropical regions. They attack using various elemental abilities, as well as their long tongues and tails.
Salmon are gray fish commonly found in bodies of water around Tamriel, and are often seen jumping to ascend waterfalls and rapids. While the other species of fish tend to swim near the surface of bodies of water, salmon may often be seen either near the surface or in the depths. Its pinkish-orange flesh is a popular food source, and can be eaten raw or salted and cooked.
Scalons (or Scalon) are large aquatic humanoids of the Shivering Isles. Naturally, they are commonly found near water, occasionally leaping from the water and attacking. They can also become invisible.
One of the lesser sentient Daedra of Oblivion, Scamps often enter into the mortal world to cause mischief and carry out errands for their Princes. They are weak, rather unintelligent, and cowardly, and are easily defeated except in large numbers. They are most commonly associated with Mehrunes Dagon, though they serve a wide variety of Princes.
Scarecrow Spectres are scarecrows animated by a ghost. They are created by hedge wizards during the Witches' Festival, a holiday that takes place on the 13th of Frostfall each year. The dark magic involved in their creation is thought to be related to the spells that transform spriggans into lurchers.
Common scorpions can be found in the desert. They have venomous stingers. See also: Giant Scorpion.
Scribs, also known as squibs or kwama scribs, are the larval form of the Kwama. They are not very aggressive, but can paralyze attackers.
The scuttler is a bipedal reptile roughly the size of a housecat. They eat insects and groundworms. Scuttlers are not related to the guar or alit, as they have completely different reproductive systems. Oddly, they are more similar to cliff racers. They are often kept as pets throughout Tamriel.
Sea Serpents are large sea monsters native to Pyandonea, capable of standing 64 feet above the water. They are tamed and ridden (or occasionally summoned) by the Maormer for use as steeds and warbeasts to support their navy, which is only possible because of the powerful snake magic of their king, Orgnum. Maormer often use serpent iconography in their weapons, armor, banners, and most notably their totems. Maormer ships are decorated with sea serpent designs and are capable of passing through the thick kelp around Pyandonea, which serves as a well-camouflaged home for the sea serpents that are Orgnum's guards and occasional mounts. Their hide and teeth are also used by Maormer to craft their gear.
Sea serpents were used by the Maormer during the Battle of Seaside Sanctuary against the First Aldmeri Dominion, and they attempted to break the wards binding a century old sea serpent in Greenshade. Maps depicted serpents in the waters south of Stros M'Kai, and the skeleton of a serpent was found in the sands of the island circa 2E 864. Snakeskin leviathans are a magickal coupling between Maormer and Sea Serpents, turning the elf subject into a large, powerful, and vicious brute, at the cost of diminishing their behavior to bestial savages. Reef Vipers, another aquatic species native to Pyandonea that are trained by the Maormer, may be related.
A bird found along Tamriel's coasts. Their feathers are used in pillows and quills.
Seekers are grotesque tentacled daedra. They are servants of Hermaeus Mora, usually guarding tomes of forbidden knowledge. Seekers have the power to banish prey with sound attacks. They are rarely seen outside the Apocrypha.
Senche-Cats, also known as just senche, are large, quadrupedal felines found in Elsweyr and Valenwood. Variants include Senche-Tigers, Senche-Panthers and Senche-Lions. The term Senche is also used to describe the Senche and Senche-Raht breeds of Khajiit, but they are not actually related.
Sep Adders (also known as Sep Vipers) are venomous winged snakes most commonly seen with brown scales and crimson eyes. While they are commonly seen in southern Hammerfell, particularly on the Hew's Bane peninsula, they also been witnessed in northern Elsweyr. Despite being winged, the Sep Adder cannot fly but can use them to glide short distances. They have also been observed to use their wings in threat displays and to shade their heads from the sun. The diet of the Sep Adder is varied as they have been observed to eat both insects and fish as well as small rodents, they are constantly on the hunt and are capable of pouncing on prey from a great distance. However, they are also edible and are described as being easy to "skin and cook", akin to a chicken.
Sep adders are often described as having a mean temperament and short tempers, like badgers in snake-form. However, this has not stopped people from attempting to tame these reptiles as pets. Other than the common Sep Adder, there are a few known subspecies; the Cobalt Sep Adder is rarely seen in captivity but is prized amongst the Hammerfell nobility for its rumored ability to be able to detect poison in drinks and food.. Another variety, the orange-scaled Infernal Sep Adder, is known to inhabit the high altitudes regions of Hammerfell.
Sentient shadows are the result of Nocturnal's shadow magic ripping a victim's shadow from their body and giving it sentience. Victims describe feeling a chill before their shadows are separated from them and then often the shadow turns on its former owner and may attempt to murder them or even may take their place. Shadows are a vital part of a person's animus and the victim is severely weakened and should they not reabsorb their shadow and instead destroy it, the victim will permanently lose some of their power. The most powerful beings such as those of the Psjiic Order, powerful mages such as Divayth Fyr, or even gods such as Sotha Sil can have their shadows ripped out of them. They have been shown to show intelligence and can even assume a person's role as seen in the second era where Sotha Sil's shadow took his place, although they are absorbed to be colder and arrogant than their actual counterparts. Shadows have a weakness to light sources.
Shadow Atronachs are a type of elemental that, like other atronach varieties, can be summoned by a conjurer.
Shalk are large and occasionally aggressive beetles which attack by 'spitting' magical fire. Despite the danger, they are herded by the Dunmer of the Deshaan region for their prized meat, resin, and carapaces.
The Shambles appear to be some sort of undead construct made of bone and lashed together with wire or bits of cloth, often haphazardly. They detonate a magical ice bomb on death.
Shearteeth are a type of fish found in the Sump on Umbriel. They are described as having a "maw full of teeth". They can reach at least fifteen feet long and have long whip-like tails, dual swimming fins on the underside, teeth that "would shame a shark", and a tough hide. They are usually non-aggressive to Skraws but will attack if the sump considers someone an intruder.
Domestic livestock all found in farms and sheepfolds. Very docile.
A rare giant insect found underground in the Forgotten Vale of Skyrim. Shellbug chitin is very hard, making it ideal for use in crafting armor. Harvesting the chitin requires the use of a pickaxe, with repeated mining of the shell causing its death.
Large fungus-encrusted insectoid creatures that can be found on the island of Vvardenfell and in Murkmire. Various varieties exist and among them are what seems to be the most common type of shroom beetle, the Ruby Shroom Shalk, a red shroom beetle and a popular house pet on the Telvanni Coast. The Blue-Cap Shroom Shalk, a blue shroom beetle and it is said to bring calm and serenity to the Dunmeri home. The Gold-Cap Shroom Shalk, a yellow shroom beetle and preferred by bankers for symbolic reasons. Some historians theorize that Shroom Beetles may have originated from Black Marsh as a result of the Dark Elves raiding Black Marsh for thousands of years in an effort to bring back things they deemed valuable, such as slave labor, livestock, and critters. 
Giant arthropods, which can be up to 60 feet tall. Used as a means of transport in Vvardenfell by manipulating exposed organs and tissues. It is said that their numbers dwindled due to the Red Year, when the eruption of the Red Mountain killed most of them and destroyed their native habitat.
Silverside Perch are common fish that can be caught in ponds, lakes, and other bodies of water across Tamriel.
A variety of humanoid Daedra with yellow skin in the service of Clavicus Vile. Barbas brought a number of Skaafin to Vvardenfell in 2E 583 to aid him in his plot to steal Vivec's power in order to locate and enter Sotha Sil's Clockwork City.
A small rodent. Skavengers are larger than rats, but smaller than skeevers. Cats can be kept around to cull them. They are a common sight in Craglorn, Summerset, Elsweyr and some parts of Vvardenfell.
The Skeever is a large rat-like creature that is commonly found in Skyrim, but can be found all throughout Tamriel. Unlike the common rat, the skeever is more feral and are prone to carry more diseases, such as Ataxia. But while they are known as pests, the skeever is actually one of the largest-known food sources for the entire continent. It is a popular prey for larger creatures but it is very common to find cooked skeever in a campfire. The skeever's tail is a common alchemical recipe for poisons, all the while, a charred skeever's hide provides all sorts of solutions for a potion, such as the ability to cure diseases. The skeever is the namesake of the Skeevera order, a classification for rodents in Tamriel. Other known members of this category include the common rat and the rabbit.
- Variations: Venomfang Skeever
Skein Beetles are Daedric imitations of Nirn's beetles. They are associated with the Daedric Prince Mephala. They are said to use their pointed proboscis to drain a victim of their blood. 
Skein Scorpions are Daedric imitations of Nirn's scorpion counterparts. They are associated with the Daedric Prince Mephala. They are the preferred companion of Deathweavers, the Knights of the Spider Cult.
Skein Spiders are Daedric imitations of Nirn's spider counterparts. They are associated with the Daedric Prince Mephala, often being summoned by her Spiderkith minions. They are the most common denizen of the Spiral Skein and can be fiercely loyal pets.
Skein Wasps are Daedric imitations of Nirn's wasp counterparts. They are associated with the Daedric Prince Mephala.
Skeletons are the reanimated bones of the dead. They're often found protecting the dungeons, forts and ruins of Tamriel. Many varieties of animated skeletons exist, some stronger than others. Skeletons have a certain resistance to edged weapons and frost spells. Though skeletons of humans and elves are generally the same, Orcs have different skulls due to their teeth, and beast races such as Argonians and Khajiit have different skulls overall.
- Variations: Rumare Slaughterfish, Small Slaughterfish, Giant Slaughterfish
Standard snakes are often seen slithering in grass. Snake charmers keep them as pets, training them to dance to their music. See also: Giant Snake
A white bear with an icy bite often found on the island of Solstheim as well as in the high mountains and icy plains of Skyrim. They are sometimes used as mounts.
A small, white furred variety of Fox that can be encountered in the colder regions of Skyrim. Rabbits are one of their favorite prey. Some are kept as pets by Skyrim's inhabitants Their pelts are often sold by hunters and are considered more valuable than those of regular foxes.
Snowy Sabre Cat
Snowy Sabre Cats are large, hostile cats with sizable teeth. They are very dangerous and will attack wildlife and people without hesitation, often ignoring the former in favor of the latter. They're found in the wilds of Skyrim. Snowy Sabre Cats carry a disease called Witbane. See also: Sabre Cat, Vale Sabre Cat
Snowrays are a pale white variant of terrestial rays, flying creatures which closely resemble the more well-known aquatic rays. They are dangerous opponents and are often found in icy areas such as glaciers. See also: Shadowray
The Sphinx is a mythical creature that has been associated with the province of Elsweyr. The nature of these creatures are unknown, or what time period they come from. There have been two known sphinxes in history, the Sphinx of Gazia, Agamanus, who has a temple made in his honor. The other was the Sphinx of Canus, Igon. In Elsweyr's northwest border is Fort Sphinxmoth, which is named after the mythical creature. It is meant to safeguard the border region of Reaper's March.
The giant spider is a dangerous foe, not only for its damaging attack, but as it can also paralyze its victim so it can feed on them later. Large Frostbite Spiders are known to live in the caves and forests of Skyrim.
- Variations: Cave Spider, Spider Guardian, Spider Savager, Diamond Spider Queen, Skein Spider
Also called Perthan, these Daedra appear as giant spiders with human torsos, and are associated with Mephala. They are so unruly and irrational that not even Mephala's worshippers will often summon them, for fear that they will disobey orders. They are some of the more powerful Daedra, with formidable melee and spellcasting ability. They can summon Spiderlings to aid them in battle.
A lesser Daedra that can be summoned by spider daedra to paralyze opponents.
- Variations: Horrid Spikeworm, Nubbed Spikeworm
Spriggans, often called Nature's Guardians, are tree spirits that take the form of female humanoids. They possess moderate intelligence, but despite being revered they are usually hostile towards travelers. Spriggans have their own unique language, which can be learned by scholars and used to calm the creatures. They are usually found protecting secluded glades and groves all over Tamriel, often blending in with the plant life and catching trespassers unaware. Spriggans attack with their long, sharp fingers as well as their teeth, and have the ability to poison enemies. They have incredible regenerative abilities, resulting in adventurers often having to defeat them several times before they remain dead. If threatened, they can call nearby woodland animals to aid them in battle, and some even have the ability to magically summon black bears.
- Variations: Spriggan Matron, Spriggan Earth Mother, Burnt Spriggan
Passive deer-like creatures that can be found bounding all across Summerset.
Squirrels are harmless rodents that live in trees. The preserved paw of rare red squirrels is considered to be a good luck charm by many Khajiit. They are sometimes hunted for their meat. The Bosmer make jagga tarts using fermented pigs' milk and squirrel preserves.
Steam Centurions (also known as Dwarven Centurions or Dwarven Mechanical Giants) are heavily armored constructs with an extendable mace on one arm. They are not as common in Dwarven ruins as the lesser Dwarven automatons. The book Ruins of Kemel-Ze implies that the constructs have a weakness to frost and magic attacks, due to the water/steam that drives them, although they are highly resistant against fire, frost and shock.
The function of the Steam Constructor is unknown, but its name implies that it may have been used in aiding Dwemer construction projects. Its appearance is describable as a mashup of various automaton parts, including the legs of a giant Dwarven spider, the upper body of a Dwarven centerion, and various other Dwarven parts mixed in.
A type of Elemental Daedra consisting of four legs and a central body with one eye, all made out of stone. Pelladil Direnni of Clan Direnni summoned an army of Stone Atronachs to build the Blackrose Prison. Stone Atronachs can seemingly be summoned from a variety of sources, including crumbling ruins.
A moderately strong Golem made out of stone.
A powerful Shock Elemental Daedra native to a pocket realm of Oblivion called Levinace. They can be summoned, and are immune to normal weapons and shock, resistant to poison and can reflect spells and damage.
Swamp Jellies are floating creatures with an elastic, gelatinous bodies that are native to Black Marsh. They are described as having a disquieting resemblance to aquatic jellyfish that natural philosophers have no adequate explanation for. They are extremely docile in nature and tend to live solitary lives from other swamp jelly, coming only together for spawn but are social animals. Their diet consists of bugs and make excellent travel companions for the marsh. Various swamp jelly breeds exist, varying wildly in their size, shape, and colors. Argonians use flavor themed naming conventions based on a swamp jelly's color hue. 
They are related to the Netches of Morrowind. Some historians theorize that the relation may be a result of the Dark Elves raiding Black Marsh for thousands of years in an effort to bring back things they deemed valuable, such as slaves, livestock,and critters.
A creature found in the Black Marsh, it is described as a mountain of spines, with nine-foot-long claws and a jaw that juts out, exposing its tusks.
This frog is an especially rare species found in Murkmire. They are pale green in color and dappled with gold, and are rarely seen, preferring to stay in their mud pits and only emerging to mate every few seasons. As their croaks are highly prized by Argonian vossa-satl makers, they developed a way to lure them out. This involves creating an artificial Toad Musk out of stench sedge, salt rush, and joymallow and applying it to a croak-wheel which mimics the mating croak of the Sun-Blessed Toad.  They are also known to be quite fragile when excited.
- Pocket Guide to the Empire, 3rd Edition: The Wilds Remain: Valenwood — Imperial Geographical Society, 3E 432
- Morrowind Fauna, Part One — Holia Asellio
- Clerk's Gull-Feather Quill and Baandari Horse Pillow item descriptions in ESO
- Divayth Fyr's dialogue in ESO: Clockwork City
- Ruby Shroom Shalk pet description in ESO
- Blue-Cap Shroom Shalk pet description in ESO
- Gold-Cap Shroom Shalk pet description in ESO
- Loremaster's Archive: Murkmire Q&A — Jee-Lar
- Appearance in ESO
- Appearance of many cats and their Skavenger kills in Shimmerene, especially around the docks
- Skein Beetle pet description in ESO
- Skein Scorpion pet description in ESO
- Skein Spider pet description in ESO
- Temple of Agamanus riddle, during The Halls of Colossus quest in Arena
- Red Squirrel Paw item description in ESO
- Pacrooti's dialogue in ESO, among other sources
- Jagga Tart Fluted Ring Pans item description in ESO
- Appearance of the Foundation Stone Atronach and Risen Ruins in ESO
- Swamp Jelly pet description in ESO
- Care and Feeding of Swamp Jellies — Aglindor the Black-Thumb
- Cantaloupe Swamp Jelly pet description in ESO
- A Guide to Gathering Frogs — Nesh-Deeka
- Nesh-Deeka's dialogue in Murkmire