Uncleaned fossil fish tail from the ancient seas.
This is a fossilized fish tail, commonly referred to as a fossil tuna tail. This fossil shows the grooves where muscle and cartilage would have connected the base of the fin to the rest of the fish's skeletal system.

This products and others you see being offered by Dark Water Megs are fossils, they are not modern bone, they are not modern animal products.
Dark Water Megs does not and has never sold animal products, these are fossils.
"Fossil: impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock"