Animals That Start With S
Discover 6 animals whose common name begins with the letter S, from Sea Otter to Stegosaurus. This includes 2 mammals, 1 fish, 1 insect, 1 bird, and 1 dinosaur. Browse photos, taxonomy, habitat, diet, and conservation status for each species. 3 of these species are classified as vulnerable, endangered, or critically endangered.
About Animals That Start With S
Diet among these species breaks down as 4 carnivores, 1 omnivore, and 1 herbivore. They live across ocean, grassland, forest, mountain, and rainforest habitats, and are native to North America, Asia, Australia, and Europe. Body weight varies across the group, ranging from 0.00002kg to 5,000kg.
S Animals

Sea Otter
Enhydra lutris
MammalThe sea otter is the heaviest member of the weasel family and one of the few mammals known to use tools, cracking open shellfish with rocks while floating on its back.

Seahorse
Hippocampus kuda
FishThe seahorse is one of the ocean's most distinctive fish, with an upright, horse-like body shape unlike almost any other fish species. Rather than swimming powerfully, it drifts through seagrass beds and coral reefs, anchoring itself in place with a flexible, prehensile tail wrapped around plant stems or coral.

Seven-Spot Ladybird
Coccinella septempunctata
InsectThe seven-spot ladybird is one of the most recognizable beetles in the world, named for the seven black spots that mark its glossy red wing covers. Both adults and larvae are voracious predators of aphids, making the species a natural form of pest control long valued by farmers and gardeners.

Snow Leopard
Panthera uncia
MammalThe snow leopard is an elusive big cat adapted to life in the high, cold mountains of Central and South Asia — including the Himalayas, the Tibetan Plateau, and ranges across roughly a dozen countries from Afghanistan to Mongolia — so rarely seen in the wild that it's often called the 'ghost of the mountains'.

Southern Cassowary
Casuarius casuarius
BirdThe southern cassowary is one of the largest and most dangerous birds in the world, a flightless giant native to the tropical rainforests of northern Australia and New Guinea. Despite its bulk, it is an excellent swimmer and can sprint through dense forest at considerable speed, using a large bony helmet-like casque atop its head to push through thick vegetation.

Stegosaurus
Stegosaurus stenops
DinosaurStegosaurus is one of the most recognizable dinosaurs ever discovered, instantly identifiable by the row of large, upright bony plates running along its back and the sharp spikes at the end of its tail. Despite its considerable size, it had a remarkably small, low-slung head with a brain roughly the size of a walnut relative to its huge body.
Alphabetical List
Interesting S Animal Facts
- Sea Otter: A sea otter's fur can have up to a million hairs per square inch, the densest of any animal.
- Seahorse: Male seahorses, not females, carry and give birth to the young, incubating eggs in a specialized belly pouch.
- Seven-Spot Ladybird: A single seven-spot ladybird can eat several thousand aphids over the course of its life.
- Snow Leopard: It can leap up to 15 meters in a single bound.
- Southern Cassowary: The cassowary is often called the world's most dangerous bird due to its powerful legs and dagger-like inner claw.
- Stegosaurus: Stegosaurus had a brain roughly the size of a walnut, remarkably small relative to its massive body.
S Animals FAQs
How many animals start with the letter S?
This page currently features 6 animals whose common name starts with S, and more are added regularly.
What is the most popular animal starting with S?
Sea Otter is the most popular animal starting with S on this site.
What is the rarest animal starting with S?
Stegosaurus has the most severe conservation status (Extinct) among animals starting with S.
Are any animals starting with S endangered?
Yes — 3 animals starting with S are classified as vulnerable, endangered, or critically endangered.