Cichlid skeleton in my new plants???

[babyshark24]

At my local fish store I was picking up some new snails and plants. They had this massive tank by the cichlid section filled with elodea, hornwort, duckweed, etc that was super overgrown. I asked for some hornwort from the tank and they gave me bushels and bushels of plants for a few pennies- we joked about how much they needed to clear out the plants to make room for a new shipment of cichlids this weekend.
I smacked those plants into a salt dip (they were crawling with tiny bladder snails) and left them to sit.
I pull the plants out and rinse them all off and... something fell out? I thought it was a dead elodea, but then I looked closer...
A skeleton!!! A skeleton of a fish! All skin and tissue was missing except for some on the tail. I pulled it out and dipped the plants in a few more solutions because that spooked me. I'll post a picture of the skeleton once my photos sync, but judging the cichlid species near the tank, I've ruled out it being an oscar.
Any opinions? Should I tell the store? The plants are all doing great...? Help???

 

[CoryBoi]

With a tank full of cichlids at a store where they get shipments of fish in like that there are going to be some that die, and within all those plants they will get unnoticed.