The category of organisms in a water ecosystem that includes the larger active swimmers is called Nekton. There are three classification of aquatic organisms that can be classified according to their location or habitat. One of them is Nekton which includes the larger swimmers in water ecosystem and the other two are Plankton and Benthos. Nekton are mostly fish or other living things that swim through the water.
I can’t read most of them, I don’t know if it’s just my device but it’s a bit blurry
he arthropods share many features with the phylum Annelida. Both arthropods and annelids are segmented, and members of the annelid class Polychaeta have a pair of appendages on each segment. ... Annelids possess a coelom, which in arthropods is present only in the embryo.
