Jellyfish Extra Credit Quiz

How long do most jellyfish live?

• About 50 years

• Less than one year

• Up to 100 years

• About 5 years

What are jellyfish MOSTLY made of?

• Mostly water, about 60%

• Mostly water, about 95%

• Mostly jelly-like substance, about 95%

• Mostly jelly-like substance, about 60%

Which of the following BEST describes jellyfish anatomy?

• They have no hearts, brains, or eyes. There is a set of nerves above their tentacles that give them basic senses.

• They are one of the first animals with cephalization, meaning they have a cluster of nerves above their tentacles that act as a brain

• They have no hearts or brains, only tentacles and a pair of eyes that see in the infrared spectrum of light

• They have complex brains, nerves, and digestive systems, just like their close relatives squids

True or false: Jellyfish and squid are basically the same thing and are closely related

• True: They're nearly identical

• True: They're related and have similar anatomy but squid are more complex

• False: They're in different phylums entirely and jellyfish are much less complex

What phylum are jellyfish a part of?

(Hint: squid are in mollusca)

• Nemertea

• Mollusca

• Echinodermata

• Cnidaria

How do jellyfish catch prey?

• Their tentacles paralyze their prey before dragging the prey into the mouth at the center of its body

• They use their tentacles to constrict and suffocate their prey before dragging the prey into the mouth at the center of its body

• Their tentacles paralyze their prey and break it down into mush that they drink with the sea water because they cannot chew

• They use their sharp claws to attack their prey before dragging the prey into the mouth at the center of its body

What do jellyfish eat?

• Fish, shrimp, crabs and tiny plants because they'll eat anything they can

• Fish, shrimp, and crabs because they're small enough to catch

• Tiny plants, algae, and kelp because they're herbivores

• Zooplankton because it is small enough to swallow without chewing

What is the deadliest jellyfish?

• Cauliflower Jellyfish

• Box Jellyfish

• Portugese Man O War

• Lion's Mane

What is the body structure of a jellyfish?

• No symmetry

• Bilateral symmetry

• Radial symmetry

• Asymmetry

How do jellyfish move?

• They use their tentacles to push them forward

• They shoot water out of their mouths to propel them forward

• They rely fully on ocean currents and otherwise float in place