Food

The Blue Dragon feeds on hydrozoans. It collects small algae contained in the hydrozoans to regenerate its own tissue. In the presence of light, these algae produce sugar which it needs to live, but it is not enough. It must complete its diet with other nutrients. Micro-algae accumulate in its body until the adults become brown, whereas the juveniles are blue.

Breeding

The Blue dragon is hermaphrodite, which means they are at the same time male and female. They have a genital orifice and a penis. However, mating necessitates two partners. They adopt a top-to-tail position to fertilize the 5000 white eggs released under the form of a transparent cord that spirals along the substratum. The adults remain several days around the place where the eggs are laid. The larvae hatch and become planktonic.

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