Coral Fact #022
When two little coral larvae decide to settle in the same spot, two things could happen. They may compete with each other resulting in one of them being killed, or in certain circumstances, they can hybridise. When a mix of two or more coral tissues from two or more genetically different individuals fuse, they are called chimeras.
Think that it is easy to find a picture of a chimera? Well it isn't. So here is just a pretty picture of an acropora reproducing. Check out the AIMS website for more awesome photos!
Being a chimera can be very advantageous. They start off bigger than normal corals so they can reproduce sooner, can acquire a long life mate with their “other half” and help each other out if one is having a bit of trouble. How nice. BUT there are a few bad things. They could compete for resources and in some cases one can act like a parasite to the other. When will corals ever learn to be nice!
Boranium 
nasty corals 😦