Nekton

Nekton are defined as:

• unable to swim against an ocean current (drift)

• able to swim against an ocean current

Nekton have adaptations to _____________ drag (water resistance).

• increase

• reduce

Pelagic fish typically have these types of fins:

• broad and highly maneuverable for sharp turns

• narrow and very stiff for high speed steering

Muscles are more efficient when they are at:

• colder temperatures

• warmer temperatures

How does the rete mirabile help predatory pelagic fish?

• cools their blood so they don't over heat in warm water

• conserves heat in their blood to make them fast in cold water

• both answers are correct