Ocean
This is the largest ocean on Earth.
What is the Pacific Ocean?
This is the fastest fish in the ocean.
What is a sailfish?
Jellyfish belong to this stinging animal phylum.
What is Cnidaria?
Hermit crabs use these empty homes to protect their soft abdomens.
What are (snail) shells?
Unlike fish, marine mammals use these organs to breathe.
What are lungs?
This is the percent of Earth's surface covered in oceans.
What is 72%?
This marine mammal is known for having the largest brain.
What is the sperm whale?
This invertebrate sub-phylum includes shrimp, crabs, and lobsters and all have exoskeletons.
What are crustaceans?
Hermit crabs breathe using these, which is why they must stay in a humid environment.
What are gills?
This marine mammal is famous for its long tusks and lives in arctic waters.
What is a walrus?
This is the invisible force from the moon that is mainly responsible for ocean tides.
What is gravity?
Sharks do not have bones; their skeletons are made of this material.
What is cartilage?
This hard structure protects many mollusks like bivalves and gastropods.
What is a shell?
When a hermit crab outgrows its shell, it must do this.
What is move to a larger shell?
These marine mammals use echolocation to hunt and navigate.
What are dolphins (or toothed whales)?
The deepest part of the ocean is found in this trench.
What is the Mariana Trench?
This group of animals includes sea stars, sea urchins, and sand dollars.
What are echinoderms?
This invertebrate is known for being able to regenerate lost arms and has pentaradial symmetry.
What is a sea star (starfish)?
Hermit crabs sometimes line up and wait for bigger shells in an event called this.
What is a shell exchange?
This mammal is the largest animal to have lived on Earth.
What is the blue whale?
Coral reefs are built by tiny animals in this group.
What are cnidarians? (coral polyps)
This animal has three hearts, blue blood, and is the smartest of the invertebrates.
What is an octopus?
These tiny drifting organisms form the base of most ocean food webs.
What is phytoplankton?
Pet hermit crabs need access to both of these types of water to stay healthy.
What are fresh water and saltwater?
What is blubber?