Class
Sea urchins
Spiny marine echinoderms with a rigid internal skeleton.
Status
Diet
Location
2 profiles
Other classes
- Mammals
- Birds
- Reptiles
- Amphibians
- Fish
- Insects
- Arachnids
- Molluscs
- Crustaceans
- Jellyfish and hydrozoans
- Corals and anemones
- Worms
- Centipedes
- Millipedes
- Sea stars
- Sea lilies and feather stars
- Tunicates
- Horseshoe crabs
- Sea spiders
- Early synapsids
- Prehistoric invertebrates
- Comb jellies
- Sponges
- Brittle stars
- Sea cucumbers
- Tardigrades
- Other life