Porcupine fish

This task is about features of a fish.

Question 1Change answer

 
 
porcupine fish from the side
Side view
When a porcupine fish is swimming normally its spines lie flat along its body.
   
porcupine fish from the front
Front view
A porcupine fish can inflate its body.
The fish now looks 2-3 times its normal size.
 
The porcupine fish swallows water quickly and inflates itself when danger approaches. 
Give two ways this would help protect the fish.
1. 2.