Ichthyology Homework

There are more different fish species than the combined total species of reptiles, amphibians, mammals and birds.

Scientists believe that fish were the earliest vertebrates, and that all other vertebrates evolved from fish.

Which natural grouping of fishes includes sharks and rays?

Which natural grouping of fishes includes the majority of fish species?

What is the approximate number of fish species that have been identified worldwide to date?

How many freshwater species of fish have been identified in Texas?

____________ fishes are those that live and feed on or near the bottom of seas or lakes, while ____________ fishes are those that live and feed away from the bottom in the open water column.

The function of a swim bladder in ray-finned fishes is to:

_____________ fishes such as salmon migrate between fresh and marine water during different stages of their lives.

Choose all that apply: Humans harm fish populations by ____________.