Blue sea slugs were believed to prey on the Portuguese man-of-war, which contains highly poisonous nematocysts, and uses the nematocysts for defense by incorporating them into the tips of its lateral ...

The sea angel is a sea slug… but one that took a rather different evolutionary path. The sea angel appears to ‘fly’ through the water. They are ‘pelagic’ or open water species ...

Stinging cells, produced by cnidarians such as jellyfish and anemones, are one of ocean creatures' most effective defences. This method of protection can keep almost all predators at bay - but not the ...

But it gets even stranger than that; there's a slug that can photosynthesize like a plant! Sea slugs are fascinating in ...