This picture is a porcupine puffer fish.
Structural adaptation is the change made to the outside of the body.
Puffer fish has the ability to blow up like a huge ball. They inhale a lot of water to blow up like that. Puffer fish have spines that looks like spikes. They have a high maneuverability. They also have very strong jaws and four front teeth. Which allows them to eat things with shells. Puffer fish are a medium size fish, but they can blow up 2 to 3 times their original size.
Structural adaptation is the change made to the outside of the body.
Puffer fish has the ability to blow up like a huge ball. They inhale a lot of water to blow up like that. Puffer fish have spines that looks like spikes. They have a high maneuverability. They also have very strong jaws and four front teeth. Which allows them to eat things with shells. Puffer fish are a medium size fish, but they can blow up 2 to 3 times their original size.