Strange Fish (Bones) Mutation?

Hello ATS members,
I will keep this short so, i am a cook and currently working at a restaurant for 1 year and a few months now.Lately i saw something strange about the Seabass that we got (this observation happened 2-3 months ago) 7 out of 10 fishes had a mutation that started behind the dorsal fin.I know as fact that these Seabass are farmed, couldn't find on google about this kind of mutation.
Unfortunately i don't have the picture of a full fish but i can get some if you would like, I got the bones though
Please let me read your thoughts about this

Love

Maybe from being in bred and squished into tight pens?
or maybe theyre evolving humps?

reply to post by MoldOfIce

i have seen this in fish harvested with electricity, the shock causes muscular contractions which dislocate bones.

This doesn't look to me like electric shock