Q 01/05

Which tiny sea creature can turn its adult body back into a juvenile polyp and start life again?

A) Phantom jellyfish

B) Ghost jellyfish

C) Immortal jellyfish

D) Flower hat jellyfish

Answer · why

C) Immortal jellyfish

The immortal jellyfish reverts to a polyp when starved, injured or old, then grows into fresh young jellies. In theory the cycle can repeat forever, t...

Q 02/05

Which stinging drifter with a gas-filled float is a colony of specialised units rather than a single animal?

A) Portuguese man o' war

B) Purple-striped jellyfish

C) Cannonball jellyfish

D) Mauve stinger

Answer · why

A) Portuguese man o' war

The Portuguese man o' war is built from many small units called zooids, each specialised for hunting, digestion or reproduction. Its name comes from a...

Q 03/05

Because a jellyfish's gut has just one opening, which body part must also serve as the animal's anus?

A) Stomach

B) Mouth

C) Tentacles

D) Bell

Answer · why

B) Mouth

The mouth of a jellyfish sits at the tip of a stalk hanging beneath the bell, and waste leaves the same way food came in. No cnidarian has a separate ...

Q 04/05

The Great Barrier Reef, the biggest structure made by living things, lies off which Australian state?

A) New South Wales

B) Western Australia

C) Victoria

D) Queensland

Answer · why

D) Queensland

Queensland's coast is fringed by more than 2,900 individual reefs stretching over 2,300 kilometres. The whole system is big enough to be seen from spa...

Q 05/05

Which group of sea jellies steers around obstacles with 24 eyes and includes one of the world's most venomous animals?

A) Box jelly

B) Helmet jelly

C) Stalked jelly

D) Barrel jelly

Answer · why

A) Box jelly

The box jelly carries six eyes on each of four sensory clubs, some complete with a lens, cornea and retina. A severe sting from the largest species ca...