Squids drop apples

I was trying to gather ink sacs so I could make some black wool for my chessboard and when I killed a squid, it dropped apples instead. A chessboard is pretty useless without black tiles...

What I expected to happen was...:
When I killed a squid, it should have dropped an ink sac.

What actually happened was...:
Instead, it dropped an apple.

Steps to Reproduce:

1. Find a squid (though we all know how difficult they are to find when you actually want to find one).
2. Kill the squid.
3. Notice that it drops apples instead of ink sacs. How am I supposed to get black dye now?