Thorny Sea Star
Thorny sea stars are a species of sea star found in the Indo Pacific regions. They have rows of spikes or 'horns' on their backs hence their name Thorny! The dark protrusions on their back are a great form of defence against predators and scare predators away by their frightening appearance.
The blue starfish has a bright blue or light blue body. The animals get their colour from a blue pigment called linckiacyanin and some accessory yellow carotenoids. The blue starfish has 5 cylindrical arms with rounded tip and it may grow up to 30-40 cm in diameter. It’s particularly common in shallow water, but is found as deep as 50 m.