SpinyheadPlay freeFull-moon nests
Around the full moon, blue chromis males leave the cloud, clean a patch of rubble and guard the eggs females lay there, turning darker near the bottom. With the males down, the cloud thins and more plankton gets through to the blennies.
Species involved
Spinyhead is a free game you play in your browser: you are a spinyhead blenny, a fish about 3 cm long living in a worm hole on a Caribbean coral head. Feed, fight for a better hole, court, raise eggs and dodge predators, while everything around you behaves the way field biologists have seen it behave. Most behaviors in the game come from published field studies; the rest are borrowed from other reefs or extrapolated, and this page says which. There are 82 on these pages, and more in the game’s field notebook waiting to be found.
More chromis nests
Other reef behaviors to discover
