They protect the sea urchin from predators, help in movement and burrowing, and they help them with camouflage.
Sea urchins and sand dollars.
There are many small animals that live in seaweed. Invertebrates such as, bristle worms, scud, prawn, snails, and brittle stars feed on the seaweed. Sea stars, anemones, crabs, jellyfish, and other small fish live in seaweed.
There are two common definitions of urchins. An urchin may be a sea urchin, a small prickly animal or to a street urchin or homeless child living on the street.
Deforestation: People cutting down trees for agriculture or urban development disrupts habitats for many species and reduces biodiversity. Pollution: Dumping waste materials into rivers, oceans, and soil can harm organisms and disrupt the balance of ecosystems.
You have to have two sea animals and then......
A slug and a sea anemone.
Many animals live in the sea. -Whales, dolphins, seals, walruses and manatees live in the sea permanently. Other animals spend much time in the sea, but don't actually live there, -polar bears and sea otters being two of them
eat and poop
Echinoderms are not 'grouped' with the starfish and sea urchins. Rather echinoderms are the animal phylum to which starfish and sea urchins belong to. Star fish belong to the class Asteroidea and sea urchins belong to the class Echinoidea. There are other echinoderm classes such as sea cucumbers (Holothuroidea) and brittle stars (Ophiuroidea) are two of them. All these classes fall under the Echinoderm phylum. All echinoderms share some distinguishing features: 1. Their adult bodies are arranged in five equal parts 2. They have an internal calcium carbonate skeleton 3. They have a mouth, but no head or brain (they do have a nervous system) 4. They can posses tube feet for locomotion 5. They posses a internal hydraulic system consisting of tubes of sea water to regulate the body's internal pressure and to control movement feeding and respiration.
lots of animals eat plankton, some whales, whale sharks, zooplankton eat phytoplankton and lots of fish eat plankton.
The auroch was one of the only animals to eat grass in its time. The animals lives two million years ago.