Thank you for reporting this, as others have mentioned, small fish can stack together in the inventory. Was the label on the stack generic or did it label them all as clown fish?
For the skinned crabs, this is one the team are aware of and they should vanish when the game is reloaded, or if you go to another island and back again (so the island they are on unloads and reloads). If they don’t, please let me know.
Thanks for getting back to me, I am going to file a report on this for the team and put in a request it be changed to make it clear it’s a mixed stack.