Madagascar Blind Cave Fish (Typhleotris madagascariensis)

Interesting, I didn't know Madagascar had Blind cave fish. It appears to be swimming upside down. Is that a thing this species does or is this one just dead...?

I think this is the back of the animal (you can kinda see the spine ridge) They look very odd indeed but this one was very much alive.

@Giant Eland It does seem to be swimming upside down though, you can see the vent and the structure of the bottom of the head. I never knew about this behavior until now, and I couldn't find much online about it but some videos or images do show them swimming upside down. 54 Blind Fish Stock Videos, Footage, & 4K Video Clips - Getty Images
Very very nice sighting!

@splendens Ahh okay thanks!! That is interesting then! Certainly wasn't anything I noticed in person.