no it is not
sea urchins
No, sea urchins are not fish. They are marine animals belonging to the phylum Echinodermata, whereas fish belong to the animal kingdom Chordata. Sea urchins have a hard outer shell made of calcium carbonate and are more closely related to starfish and sand dollars than to fish.
Yes, urchins are considered "cleaners" and will scavenge the bottom of the tank for food.
There are several animals that eat sea urchins. Sea otters, sunflower stars, snails, crabs and some species of fish predate upon sea urchins.
Green Sea Urchins eat plankton, algae, small fish, mussels, sponges, and brittle stars.
i think yes
Otters and some kind of fish.
Sea urchins mainly eat algae and coral. However, they also are known to sometimes feed on decomposing matter such as dead fish.
Yes sea urchins are posibly to be called caniballs. even these animals are stealth like enough to catch small fish that swim by.
In the 1800s, too many sea otters were hunted for their fur. Without sea otters, fewer sea urchins were eaten. Soon, too many sea urchins were being born. Smaller fish could not survive, because sea urchins ate their supplies of kelp. These fish were food for sea stars and crabs. The sea stars and crabs began to die out.
Herring primarily feed on plankton, small fish, and other marine organisms, rather than sea urchins. Their diet consists mostly of small crustaceans and fish larvae. While herring may occasionally consume a variety of small invertebrates, sea urchins are not a significant part of their diet.
sharks, seals, whales, and big fish