Sources : Sea-centipede

Aristotle [ca. 350 BCE] (De animalibus, Book 9, 25.4): The creature called scolopendra when it has swallowed the hook turns itself inside out, till the hook is ejected, when it turns to its original form. The scolopendra, like that which inhabits the land [centipede], is attracted by the smell of cooked meat; it does not bite with the mouth, but stings with the contact of the whole body, like the creatures called sea-nettles. - [Cresswell translation, 1887]

Pliny the Elder [1st century CE] (Natural History, Book 8, 28): The scolopendra, which resembles the land animal called the centipede, when it has swallowed a hook vomits up the whole of its inwards until it succeeds in disgorging it, and then sucks them back again. - [Rackham translation]

Aelianus [170-230 CE] (On the Characteristics of Animals, Book 4.22; 7.26; 7.35; 13.23): [Book 4.22] The Sea-scolopendra bursts, they say, when a man spits in its face. [Book 7.26] And doubtless the same [human] spittle is most effective at killing even sea-scolopendras. [7.35] The Scolopendra is a creature of the sea and looks exactly like the land-scolopendra [centipede]. And if a man's skin come in contact with it, he at once feels a stinging and irritation, and has the same kind of pain as from the plant they call the nettle. [Book 13.23] I have ascertained that the Scolopendra is a sea-monster, and of sea-monsters it is the biggest, and if cast up on the shore no one would have the courage to look at it. And those who are expert in marine matters say that they have seen them floating and that they extend the whole of their head above the sea, exposing hairs of immense length protruding from their nostrils, and that the tail is fiat and resembles that of a crayfish. And at times the rest of their body is to be seen floating on the surface, and its bulk is comparable to a full-sized trireme And they swim with numerous feet in line on either side as though they were rowing themselves (though the expression is somewhat harsh) with tholepins hung alongside. So those who have experience in these matters say that the surge responds with a gentle murmur, and their statement convinces me.- [Scholfield translation]

Thomas of Cantimpré [circa 1200-1272 CE] (Liber de natura rerum, Fish 7.74): Scolopendre, as Pliny says, are like the terrestrial animals called centipedes. Having swallowed hook, they vomit everything inside them onto the ground, and once they have ejected the hook they swallow what they had vomited. With these fish are signified those who, feeling that earthly riches are a danger to themselves, throw them away, devoting themselves to a common life in a monastery. When they have considered a little, and are not willing to be content with their common wages, they again gather their properties to themselves and become worse for that, and like dogs returning to their vomit they take their money with them to destruction. - [Badke translation/paraphrase]