Sea slugs have no shells to protect their soft rippling bodies. They have no natural defences. So they

gobble protective weapons!

Glaucus eats the sting cells of the jelly fish Porpita, but does not digest them. Instead these cells

are passed in tact, to the slug’s skin – ready for use against any predator.

Another slug eats the the stinging buds of anemones – since it is immune to them. The buds are swallowed

whole and in tact. They are guided through the intestinal walls to the back. They nestle under the skin

there. If triggered, the stings shoot out at the enemy!

Fighting with borrowed weapons!!!