What do pet lobsters eat?
Anything, generally. You should feed them prawns, whitebait (lancefish), cockles and occasionaly try them on vegetable matter like cucumber. Do not keep them with fish, they will catch and eat them. Also, bear in mind that almost every species is illegal to keep in the UK, so check out the species before you buy. They also grow very large (12″) and can be very nasty to each other.