Because the urchin life involves two or more ecological niches, they are more susceptible to predation and exposure to environmental toxins. What environmental conditions, predators and toxins might they be exposed to at each stage?

Sea urchins are spiny animals found in the aquatic habitat. They have similarities as the hedgehog and are referred to as Sea hedgehog. They feed on algae.

They are exposed to these conditions which include:

Environmental conditions - Changing water temperature and algal bloom

Predators - Crabs, Eels, Fish, Sea otters, Bird, Man

Environmental Toxins - Irgarol, Diuron, Polychlorinated biphenyl congeners.