Freshly killed prawn is sometimes accepted by difficult species that refuse Mussel. They are quickly attacked by a wider range of fish and crabs than the Prawn. Because of this, the introduction of a net full of Shrimps will start an amusing feeding frenzy. They provide excellent live food. The commonest species found are Isopods, Mysids, Sandhoppers and other prawn-like creatures.
Isopods are marine woodlice.
All other Isopods are eaten. The amphipod Gammarus locusta is found under rocks amongst large brown seaweeds. It crawls away on its side and is swallowed by small Butterfish , Pholis gunnellus and almost any rock pool fish. During late Spring and Summer, small Shore Crabs can be found in their thousands hiding underneath almost every rock and scampering over the sand. Young crabs will be eaten whole by Blennies and Wrasse.