Portuguese man o' war
Amongst the thousand or so species of invertebrates found in the Italian marine environment are "Squilla mantis", Mediterranean slipper lobsters, common octopus, common cuttlefish, scribbled nudibranch, "Hypselodoris picta", tasselled nudibranch, "Flabellina affinis", precious coral, zigzag coral, purple sail, Mediterranean jellyfish, spiny spider crab, circular crab, broad-clawed porcelain crab, noble pen shell, pilgrim’s scallop, ragged sea hare, violet sea hare, Portuguese man o' war, black sea-urchin, purple sea urchin, Mediterranean starfish, sea mouse, and "Parazoanthus axinellae".