Mollusks

Mollusks are invertebrates that protect their soft body with a shell. They have muscular feet or tentacles to move, a radula, which is a toothed structure to grate food, and most have gills. There are more than 50,000 species. Some are Electric Clam (Ctenoides ales) and squid (Nototodarus sloanii)

Ecinoderms

These invertebrates have no heart, brain, or eyes. Their mouth is underneath them and their anus is on top. They reproduce sexually and externally, and can regenerate limbs, spines and intestines. They are often hosts, but protected by spines. They have radical symmetry and multiple arms. Some of the 7,000 species are starfish (Asteroidea) and sea cucumber (Holothuroidea).