The eyes of the Norway lobster are very sensitive to light and their retinas can be damaged if exposed to too much light. This is one of the reasons why it can be found at depths from 20 metres down to 800 metres. In fact, its entire circadian rhythm is centred around the available light. Lobsters that live in shallow water are most active at night, while individuals which live in slightly deeper water tend to be active at dusk and dawn. Individuals which live deepest of all like to use the little light that is available during the day to find food. Norway lobster are omnivorous, so they can eat anything from molluscs, annelids (worms) and crustaceans to carrion.