Most will settle to the bottom and be benthic dwellers however, there are pelagic tunicates that remain as plankton Collector urchin Meroplankton (benthic) Larvae settles to the bottom and that’s where the urchin remains grazing on algae. Tunicate Holoplankton/ Meroplankton (benthic) All tunicates have a tadpole larval stage. Many will form a calcium carbonate skeleton. ![]() Lobe coral Meroplankton (benthic) Corals produce a drifting planula larva that will settle to the bottom forming a polyp. Giant clam Meroplankton (benthic) After hatching from an egg, their larval stage settles to the bottom and they become bottom dwellers. Comb jelly Holoplankton These animals have eight rows of cilia that don’t really do much for helping them swim. Commerson’s frogfish Meroplankton (benthic) Not a strong swimmer, but meroplankton is a good guess. Snowflake moray Meroplankton (benthic) Lives in crevices and is a good swimmer as an adult. Seahorse Holoplankton (benthic) If its tail wasn’t wrapped around seagrass, it would probably be swept away by a current. ![]() Also this particular species lives on the bottom but can swim vertically. During the polyp stage they are attached to the bottom however, during the medusa stage they are free swimming, but can’t fight a current. Upside-down Jellyfish Meroplankton Jellyfish have 2 stages in their lifecycle: medusa and polyp. Krill Holoplankton/ Meroplankton (pelagic) The small ones are holoplankton, but some get large enough that they become good planktonic swimmers. Copepod holoplankton Tiny organisms can’t fight the current, but they are able to move during their daily vertical migration in the water column. Some dinoflagellates, like zooxanthellae, live inside the tissue of coral, anemones, jellyfish, and giant clams. Dinoflagellate holoplankton These have flagella for moving in the water, but they are very small and can’t fight the current. ![]() For instance, many chemosynthetic bacteria from the hydrothermal vents live inside tube worms. Organisms Bacteria holoplankton Tiny organisms can’t fight the current. Needlefish Sting ray Snowflake moray Garden eel spotted boxfish Orange Spine Unicornfish Commerson’s frogfish Divided flatworm Krill Mola mola (ocean sunfish) tunicate Peacock flounder Manta ray longnose hawkfish collector urchin Upside down Jellyfish Manta ray Spanish Dancer Nudibranch Spinner dolphin Seven eleven crab Seahorse There may be some exceptions.Ĭomb jelly squid White spotted Sea cucumber Bacteria octopus Dinoflagellate Giant clam Gannet Triggerfish Whale shark lobe coral Copepods Do note that it is not always easy to place an organism in one exclusive group.
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