Monos are often found in East Africa, India, Australia and South Asia and are often referred to as Diamond Moonfish. Although mostly born into brackish waters the Monos will migrate into the coastal waters with higher salinity.

You can identify the Monos by their body which is diamond shaped with a shiny silver colour, along with a light yellow colouring on the dorsal, anal and tail fins. They have a black line that comes down to their eye and another that runs the full height of their body just behind it looking as if they are wearing some sort of face paint. Mono’s male and female look exactly the same so can not gender identified.

A schooling fish, Monos tend to exists in groups of 5 or more and will often be seen swimming around the Aztec Reef all together. They are relatively peaceful fish, they can become aggressive within their own school so the bigger the group the better the relationships as aggression is more thinly spread. The group work together to find food and to help keep each other clean and healthy. These fish develop a hierarchy within their school, with the largest fish being the most dominant and will eat first.


Fish: schooling peaceful fish

What do they eat?

Plants and insects


Max 27cm

Water Type

Brackish / Salt Water

Where are we?

Pacific Ocean, Indian Ocean, Red Sea, Persian Gulf

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