Because the males fight each other, they cannot be kept together.

The males will fight each other and can not be put together.

Males will usually fight and large numbers prevent a single fish from being targeted.

Males will fight for groups of females which form during the breeding period.

During these periods, the males fight each other for access to females.

Males sometimes fight for breeding rights which results in dominance.

The males fight each other, she said, but often, females do not choose the winners.

Then the male and female will fight briefly, standing upright like two males.

Adult males are very competitive with each other and will fight for access to females.

Males often fight one another if they come within 1 m of each other, frequently leading to injuries.