The fish is increasing in size and its sharp thorns become more dangerous. On the photo you also see a small blue fish that cleares diodon's gills.

A burrfish hides in shadow of a coral
A burrfish near a coral

Black-spotted porcupinefish

( Diodon hystrix )

The fish is increasing in size and its sharp thorns become more dangerous. On the photo you also see a small blue fish that cleans diodon's gills.