Reef Life 🪸
Ocean Systems
Water Chemistry
Animal Behavior
Cool Ocean Facts
100

This brightly colored reef fish uses its strong beak-like mouth to scrape algae off rocks and coral.

👉 What is a parrotfish?

100

This ocean is the coldest and surrounds Antarctica.

👉 What is the Southern Ocean?

100

This measurement tells whether water is acidic, neutral, or basic.

👉 What is pH?

100

This behavior helps fish avoid predators by moving together in tight groups.

👉 What is schooling?

100

This shark is considered the fastest in the ocean and is known for powerful bursts of speed.

👉 What is a mako shark?

200

This reef animal has a soft body, no bones, is the main prey source for deep diving whales and lives in the twilight zone. 

👉 What is a Giant Squid? Acceptable: Colossal Squid)

200

These shallow coastal zones are exposed at low tide and filled with organisms adapted to changing conditions.

👉 What are tide pools?

200

This compound builds up in aquariums as the final product of the nitrogen cycle and while not harmful in low levels - can stress fish at high levels.

👉 What is nitrate?

200

This large, wing-shaped animal glides through the ocean, has no bones, and often visits cleaning stations.

👉 What is a manta ray?

200

In a group of 8 clownfish living in a single sea anemone, how many would be female?

👉 What is 1?

300

These reef fish remove parasites from larger fish in a mutual relationship.

👉 What are cleaner wrasse? (✅ Acceptable: remora)

300

This inland body of water in the western United States has no outlet, causing salt to build up over time.

👉 What is the Great Salt Lake?

300

This toxic waste produced by fish is the first compound in the nitrogen cycle.

👉 What is ammonia?

300

This colorful seabird dives from high cliffs and can carry multiple fish in its beak at once thanks to a specialized tongue and jaw.

👉 What is a puffin?

300

This ocean animal has three hearts and blue blood.

👉 What is an octopus?

400

This reef predator has venomous spines and is known for spreading rapidly in the Atlantic.

👉 What is a lionfish?

400

This type of ocean water forms where freshwater and saltwater mix, creating unique ecosystems.

👉 What is brackish water?

400

This measurement reflects the buffering capacity of water including calcium, magnesium, and strontium and helps keep pH stable in aquariums.

👉 What is alkalinity (KH)?

400

This small marine animal creates one of the loudest sounds in the ocean by snapping its claw to stun prey.

👉 What is a pistol shrimp?

400

This is the largest species of penguin in the world.

👉 What is the emperor penguin?

500

This reef process occurs when corals lose their color due to stress, often from temperature or water condition changes.

👉 What is coral bleaching?

500

Most Atlantic hurricanes occur during this 6-month period of the year.

👉 What is June 1 to November 30?

500

Coral reefs are typically found in ocean water with an average salinity around this value.

👉 What is about 1.025 - 1.027?
(accept: 1.025, 1.026, 1.027, ppt 34, 35, 36)

500

The Great White Shark is responsible for the most recorded bites on humans worldwide which shark is responsible for the second most attacks on humans.

👉 What is the tiger shark?

500

This rotating column of air and water forms over the ocean and looks like a tornado on water.

👉 What is a waterspout?