What animal group starts with the letter S?

There are many animal groups that start with the letter "S"! Here are a few examples:

* Squirrels: Rodents known for their bushy tails and acrobatic skills.

* Snakes: Reptiles with long, slender bodies and no legs.

* Sharks: Cartilaginous fish with sharp teeth and a streamlined body.

* Spiders: Arthropods with eight legs and the ability to spin webs.

* Sea turtles: Reptiles adapted to life in the ocean.

* Salamanders: Amphibians with smooth, moist skin.

* Starfish: Echinoderms with five or more arms.

Do you have a specific animal group in mind?