Unit 4. Meaning o Echino= spiny o Dermis= skin The skin of these animals is stretched over an endoskeleton, or internal skeleton formed of hardened.
Tide Pools By: Brianna Pearson Description Tide pools are areas on rocks by the ocean that are filled with seawater. Tide pools can be small, shallow.
Sea Stars, Sea Urchins, and Sea Cucumbers. Echinoderm larvae are bilaterally symmetrical; adult echinoderm have pentamerous radial symmetry (symmetry.
