The reason dead fish are so often found in a ternery is that these are the ones that have proved to be too much for the chicks to swallow.

And he said vnto them, Come yee your selues apart into a desert place, and rest a while. For there were many comming and going, and they had no leisure so much as to eate.

The fin stabilises the plane in flight.

… and a man, all in a heap in the bows of the boat, slept with both arms embracing the stem-head and with his cheek laid on the gunwale.