Albino Morays
"Pale and savage as a wolf-moon; toothed to rival the greatest of whales; and quick to take offence. Don't tease the beast. You'll be lucky to lose a leg."[1]
Albino Morays (one may infer the existence of a regular-colored moray) are large, notoriously ugly eels that hunt across the Unterzee.[2][3] Albino Morays are deceptively fast, can charge their prey with surprising force,[2] and possess sharp hooked teeth; however, they're not just dangerous while alive: their skin is tough, smells awful, and is coated in a poisonous, paralyzing slime.[4]
Despite all these dangers, some particularly adventurous tomb-colonists may allow an Albino Moray to swallow them whole; the Moray's internal secretions are apparently quite good for the skin.[5]
You know what they say: when you're zailing the zee, and an eel makes you flee... that's a moray.
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An Albino Moray.