Jellyfish are not really fish. They are invertebrate animals. This means that unlike fish or people, theyhave no backbones. In fact, they have no bones at all.
Jellyfish have stomachs and mouths, but no heads. They have nervous systems for sensing the world
around them, but no brains. They are made almost entirely of water, which is why you can look through
them.
Some jellyfish can glow in darkness by making their own light. The light is made by a chemical
reaction inside the jellyfish. Scientists believe jellyfish glow for several reasons. For example, they may
glow to scare away predators or to attract animals they like to eat.
Most jellyfish live in salt water, apart from a few types that live in fresh water. Jellyfish are found in
oceans and seas all over the world. They live in warm, tropical seas and in icy waters near the North and
South poles

7. Which one creates Jellyfish's light?
a Ocean
b. stomachs and mouths
c. chemical reaction
d salt water
e. fresh water

8. Based on the text, we know that....
a. They don't have brain, only stomachs, and mouths
b. They glow when they sleep
c. They live in the lake
d. They are part of fish
e. They are vertebrate animals

9. What is the text about?
a. Kinds of all really not fish
b. Jellyfish
c. Salt water animals
d. Some kinds of sea animals
e. Animals that live in warm & tropical seas

10. We can find jellyfish in
a. salt water in the lake
b. cold, tropical seas
c. warm tropical seas
d. in the north and south poles' land
e. fresh water in the river​