Porcupine pufferfish (Diodon holocanthus) at Bristol Zoo, Bristol, England. On the right is a Blue-spotted grouper (Cephalopholis argus) and (partially hidden on left) a Picasso triggerfish. photo 5 months 0 Cephalopholis argus w Akwarium Gdyńskim photo about 2 years 0 Blue-spotted grouper (Cephalopholis argus) at Bristol Zoo, Bristol, England. photo about 2 years 0