Bole straight and cylindrical, with modifications of low and thin fins in its base.

Surprisingly, given its primitive nervous system, the brownish-red creature swam with great dexterity, flapping large thin fins that looked like wings.

Scattered across the plain of hardened lava, thin triangular fins protruded upward, shimmering a cherry red.

Another long fish with thin, pointed fins had a toothy protruding lower jaw that ended with a short sword.

The tail is relatively short, laterally flattened, and surrounded by a thin fin.

Stronger joints allow for the use of thinner fins and new radiator and cooler designs.

They have a distinctive diamond-shaped body, forked tail and long thin pectoral fins.

Shining his light down on the bottom, he saw a wriggling white streak with a long thin fin and black stripes.

Most Foster slugs also have "rifling", which consists of thin fins on the outside of the slug.

On the inside curve of the shaft is a thin fin of plastic.