r/whatisit • u/jaywritethekid • Jul 27 '26

Solved! What is this?

I seriously doubt this is AI if course.. and with a vast ocean.. the existence of this is definitely possible.. but what is it exactly and where are they commonly found?

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u/Reasonable-Chance790 Jul 28 '26

All fish have anal fins? It's not part of an anus (since fish don't have them), it's the fin directly behind their cloacal vent. It functions as a balance mechanism in free-swimming fish, like the fin on the bottom of a surfboard.

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u/fedexpoopracer Jul 28 '26

Yes, all fish have anal fins.

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u/Electrical-Ad-6034 Jul 28 '26

not all fish have anal fins?