#FishFriday 5 – The Picasso Triggerfish

Today we have one of the most unusual and striking looking fish – the Picasso Triggerfish (Rhinecanthus aculeatus).


This wedged shape species can be very territorial, often ‘charging’ at intruders who dare to swim over it’s piece of sand or rubble although it rarely bites.  The patterns and colours can vary largely, especially between the Indian Ocean and Red Sea sub species.


Feeding on a wide range of small marine mammals you will often see these fish puffing out clouds of sand as they sift their meals.  All triggerfish have an unusual way of propelling themselves through the water, they ‘wave’ their symmetrical dorsal and anal fins simultaneously – very bizarre!

The almost identical reef triggerfish is the national fish of Hawaii and goes by the name of humuhumunukunukuāpuaʻa!


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