What is crab eating? Jellyfish, nuidi or?

[Tobyone]

Shot at Blue Heron Bridge Singer Island, Florida with TG-6.

[Kraken de Mabini]

It looks like a partly decomposed critter, maybe a fish, as the blue part to the right looks like it might be a fish head, and does not resemble any nudibranch I can think of.

[Tobyone]

On 1/3/2024 at 9:34 AM, Tobyone said:

Shot at Blue Heron Bridge Singer Island, Florida with TG-6.

The crab is about 40-50 mm across. I thought it look like a parrot fish in a night cocoon But the tentacles looking  things confused me.

[Ruben]

Looks like a bluebottle (some local equivalent)? https://oceana.org/marine-life/bluebottle/