Anglerfish are fascinating creatures. Many species practice sexual symbiosis, where the male's body permanently fuses with the female after mating. Basically it degrades to a set of gonads, so this individual is most likely female.
https://www.nationalgeographic.com/animals/fish/facts/anglerfish
Deep sea critters do wash up occasionally. Not every occurrence needs to be extrapolated to gloom & doom.
https://www.nationalgeographic.com/animals/fish/facts/anglerfish
Deep sea critters do wash up occasionally. Not every occurrence needs to be extrapolated to gloom & doom.