Ynghylch

Octopuses are relatives of squid and cuttlefish - a group of molluscs known as cephalopods. Octopuses have 8 arms attached to their head, each with a double row of suckers. They have a soft-bag like body and can squeeze into the smallest of spaces to avoid predators or hide from their prey. The common octopus's favourite food is crabs - in fact a pile of empty crab shells is normally a sign that a well-fed octopus is somewhere nearby! These piles of discarded shells are called a midden. Octopuses are pretty inactive during the daytime, so it's easier to spot them out and about on a night dive. They are masters of camouflage and will change colour and texture depending on their mood or the situation.