‘Mind-boggling’ sea creature identified as digenean trematode
Parasites are always the weirdest.<p>Parasitic crustaceans: <a href="https://bogleech.com/bio-paracrust" rel="nofollow noreferrer">https://bogleech.com/bio-paracrust</a><p>Parasitic jellyfish: <a href="https://blogs.scientificamerican.com/artful-amoeba/when-jellyfish-became-parasites-strange-things-happened/" rel="nofollow noreferrer">https://blogs.scientificamerican.com/artful-amoeba/when-jell...</a><p>Another parasitic jellyfish (its larva develops inside-out, then turns itself outside-in when it bursts out of its host!): <a href="https://en.m.wikipedia.org/wiki/Polypodium_hydriforme" rel="nofollow noreferrer">https://en.m.wikipedia.org/wiki/Polypodium_hydriforme</a>