Open Ocean Challenge

The photic zone (or epipelagic zone) stretches down to about _______ deep.

• 200 meters

• 1000 meters

• 20 meters

At the surface of the open ocean, there are many spaces for fish to hide from predators.

• True

• False

Organisms in the open ocean spend most of their lives away from the ocean bottom and away from the land out in the open ocean.

• True

• False

The small plant-like organisms found at the surface of the ocean that perform photosynthesis are called:

• phytoplakton

• zooplankton

• bacteria

True or False: Plankton are a VERY important source of food for the rest of the open ocean.

• True

• False

True or False? Open Ocean organisms are often very good swimmers and are torpedo shaped.

• True

• False

Whales, tuna, and dolphins are found in the open ocean.

• True

• False

Tuna have adaptations that help them swim fast through the open ocean. Tuna can swim at speeds up to...

• 45mph

• 25mph

• 10mph

• 70mph

Tuna and other open ocean fish migrate in order to find two things:

• Food

• A Mate

• Coral

Transparency is a common adaptation or form of camouflage for organisms living in the photic zone.

• True

• False