Consider stocking at least a few representatives from each of the following groups: Sponges — many types, shapes, sizes and colors Zoanthids — colonial anemones (some can be harmful to true corals) Anemones — short tentacle, long tentacle and carpet Corallimorphs — mushroom anemones, Ricordea, Discosoma and elephant - ear Cerianthids — tube - dwelling anemones Mollusks (with and without
shell)-- sea slugs, sea hares, nudibranches, turbo snails and many types of living
shells and clams Cephalopods — octopus and cuttlefish Worms — feather dusters Arthropods —
crabs, hermit
crabs, shrimp and lobsters Echinoderms — sea urchins, sea cucumbers, sea stars (
starfish), serpent stars and brittle stars.
Calcite - A calcium carbonate (limestone) mineral, used by
shell - or skeleton - forming, calcifying organisms such as foraminifera, some macroalgae, lobsters,
crabs, sea urchins and
starfish.