The discovery of new (or new to me) animals make me want to live forever.

A sea slug that is known by the name Blue Dragon?!

Someone has an overdeveloped sense of self-esteem. :)

G. atlanticus preys on other, larger pelagic organisms: the dangerously venomous Portuguese Man o' War Physalia physalis; the by-the-wind-sailor Velella velella; the blue button Porpita porpita; and the violet snail, Janthina janthina. Occasionally, individual Glaucus become cannibals given the opportunity.

Wait, did they say Violent Snail?!

Or ViolET snail. Although, the idea of a snarling snail is charming. (As long as it remains under 5 inches and is not poisonous. Ruuuuuuuuun awaaaaay!)

Why under 5 inches?

I think the largest banana slug I've seen was about five inches. Plus, if it's snarling, I think less is just fine.

In general it's a good idea to steer clear of snarling animals.