Amphipods are the most abundant of free-swimming creatures in the deepest depths
Larvae: Although adult echinoderms (sea stars and kin) we are used to seeing have radial symmetry, their larvae start out with bilateral as do most vertebrates. These larval brittle stars are an important pelagic stage for dispersal of their bottom-bound parents. They capitalize on the abundance of food in the plankton to support early growth prior to metamorphosis and settlement to the sea floor.
18 Mind blowing STARFISH PHOTOS and FACTS Sea star or Star fish (asteroidea), is not actually a fish. The most popular type is the starfish with 40 to 50 “spokes”. They have no brain, or blood. We can find more than 2,000 types of sea stars worldwide.