More than 1,000 species of amphibians swim and are found in the Amazon.

Only a few species, such as fish, swim actively against the stream.

The species swims through the water on its back, using two stalked compound eyes to see where it is going.

Some species may, under certain circumstances, swim with undulating movements, but only for a short period of time.

Hercules was now quite excited: he was sure that some entirely new species had swum into his ken.

Thirteen species of scallops swim in coastal Northwest waters, but few are harvested.

The two South American species swim and dive less often than the three northern ones.

These species swim in the same way as sea turtles do (see below).

Both species swim in a head down position, due to their feeding habits in the wild.

Some species will swim there for two seasons, others for up to five.