Nope. They are nekton because they actively swim and catch their food.
Sea otter are nekton and plankton; they can float and swim.
A sea urchin is classified as benthos. Benthos refers to organisms that live on or near the bottom of a body of water, and sea urchins typically inhabit the ocean floor, often among rocks or coral. In contrast, plankton are free-floating organisms, and nekton are active swimmers.
benthos
Oops that definition was for nekton. Sorry! Nekton are any sea animals that live on the ocean floor, from the continental shelf to the abyssal plain. Starfish, coral, sea urchins, and crabs are included.
No. Sea urchins live in the sea.
a sea cucumber is a benthos because it does not move is just stays on the ocean floor
More sea urchins.
The classification of a Sea Urchin is Echinoidea
there are excatly 3million purple sea urchins
sea urchins eat kelp.
The plants and animals that live in or on the bottom of the sea or lake can be referred to as benthos.
Echinoderms.