Starfish
Definition 1 of 1
Pro Tip 1/3
Habitat Understanding
Starfish live in the ocean, not in freshwater lakes or rivers. The aquarium's saltwater tanks are perfect for starfish.
Pro Tip 2/3
Physical Diversity
Some starfish have more than five arms, up to fifty! This species of starfish has nine arms.
Pro Tip 3/3
Not Actual Fish
Despite their name, starfish are echinoderms, not fish. They don't have gills, scales, or fins. Starfish don't swim like fish; they crawl with tiny tube feet.