Readers ask: Which Of The Following Is Not A Food For Otters Sea Urchins Clams Mussels Kelp?

What do sea otters eat and sea urchins eat?

Sea otters are foragers that eat mostly hard-shelled invertebrates, including sea urchins and a variety of clams, mussels, and crabs. They have an interesting method of eating their prey. Sea otters dive to rocky reefs, where they collect invertebrates and also a large rock.

What do sea otters eat?

Diet/Amount Southern sea otter consumes many types of prey including sea urchins, snails, clams, abalone, mussels, crabs, scallops, fish, barnacles, octopus, worms, and squid, which it captures with its clawed paws, not its jaws.

How do otters eat sea urchins?

Otters get urchin shells open primarily be hitting them, either with a rock or against a rock. When they can, otters will simply smash an urchin shell against a large rock until it cracks or pops open; but they’re known to show up to mealtime already equipped with the necessary tools.

What are their two primary food sources for sea otters in the kelp forest?

A loss of organisms on higher trophic levels, such as carnivores, can also disrupt a food chain. In kelp forests, sea urchins are the primary consumer of kelp, and sea otters prey on urchins.

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What animals eat urchin?

Sea urchins are sought out as food by birds, sea stars, cod, lobsters, and foxes. In the northwest, sea otters are common predators of the purple sea urchin. Humans also seek out sea urchin eggs, or roe, for food.

Do otters eat sea stars?

Sea otters eat many kinds of invertebrates, including sea urchins, abalone, clams, crabs, snails, sea stars, squid & octopuses.

Do otters eat off their stomachs?

Sea otters are one of the only mammals that are been known to use tools to obtain and eat their prey. Once at the surface, they often eat by placing the food on their stomachs, and then placing a rock on their stomachs and then smashing the prey on the rock to open it and get at the flesh inside.

How many fish do otters eat a day?

They eat fish in the winter when the fish are most vulnerable especially they target hand-fed catfish; they eat two to three pounds of fish per day.

What do otters do all day?

Otters spend a good part of their day grooming themselves. They clean their fur by biting it and scratching it against rocks, or rubbing it on logs or grass.

What relationship exists between the sea otters and sea urchins?

The sea otter and kelp also have a mutualistic relationship. The sea otter eats sea urchins which if there is a large population makes the kelp endangered. Once the kelp dies it floats up and provides the sea otter with a source of food. Since both organisms are benefitting this is an example of mutualism.

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Who eats sea otters?

Predators of sea otters include sharks and killer whales. Sea otters dive or play dead when they sense danger, or may signal alarm by raising a forepaw. The Alaskan subspecies have predators on land such as coyotes or brown bears. Bald eagles have been observed swooping down and grabbing sea otter pups.

What type of fish eat sea urchins?

Sheephead (Semicossyphus pulcher) eat sea urchins, whose grazing habits can wreak havoc on community composition in kelp forests.

Why do otters need kelp?

Sea otters are a keystone species, meaning their role in their environment has a greater effect than other species. By maintaining healthy kelp forests, sea otters also indirectly help to reduce levels of atmospheric carbon dioxide, a prevalent greenhouse gas, as kelp absorbs and sequesters carbon.

Is kelp bass a secondary consumer?

The sea otter is a secondary consumer, an omnivore, and eats kelp ( kelp is a kind of seaweed) and sea urchins. Large fish are omnivores, secondary consumers, and eat kelp and small fish. Large fish include grouper, tuna, and others. Zooplankton is a primary consumer that is a herbivore and eats phytoplankton.

What ocean animals eat kelp?

In the north Pacific, the sea otter is the main and only predator of kelp. On the California current, sheephead and spiny lobsters eat kelp too, along with the sea otters.

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