The big fin was a maze of piping.

The big fin had stopped moving.

The ship had a low bulge along its upper flank, and rising from this, two big thick vertical fins one behind the other.

The cages atop the big fins swung open, to show beneath them small chambers with large hatches at the bottom.

There were big Navy-style fins at the ankles.

It grows to about 30 inches in length with big, broad pectoral fins and no swim bladder.

Its legs were short, ending in big splayed fins.

The port wing crumpled and the nose dropped, so that we could see the big double fin of a Dornier.

He got a slippery grip on a big blue ventral fin.

It's a revolving drum with big fins attached to the outside that activate and actually play the drums for four bars.