It has a rather large fin on its back for its size.

They use their large pectoral fins to rest on the bottom and to detect food.

This was, so far as Keisha could tell, some sort of fish, with a large top fin.

They had fairly large fins similar to those on the V-2.

A large fin on the end made the cross point into the wind like an arrow.

Right before her eyes, not twenty feet away, a large fin cut the water.

Some are completely blind and they have strange large fins.

The animal is often easily recognised by the very large fins.

Other males became intimidated in the presence of a male displaying a large fin.

Updated model with larger fin and wing area; 470 built.