Comb Jelly
Its just a jelly right? Well, while this species has an interesting colorful show it displays, it remains a scary fellow to bump into. The combs on its exterior are used as its propulsion mechanism but only seem to have bio-luminescence due too the light refracting through the comb(cilia) tissue.
Comb Jelly
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Vampire Squid
Although it may sound like you would need to fear this cephalopod, it does not consume blood. This small deep sea Squid is found in tropical and warm oceans around the world and has similar features as if a squid and octopus mixed themselves together. Its name derives from its blood red eyes but that’s about as close to a vampire that this little guy gets.
Vampire Squid