Understanding damsels, chromis, clowns...
These are the professional 'little guys' of the reef.
They require much more space than people realize: 100 gallons is good...for most.
They're also good 'dither fish,' who reassure other fish the coast is clear.

You can see dozens of them about a reef. Let a predator swim by and---boink!---if you blinked you missed it. They've all vanished.

WHere? Each fish individually has a tiny hole somewhere in the...

All of my anthias died one at a time after being happy and seemingly healthy for over 9 months in the tank. First the male died, then the super female changed into a male, then the other females died one after another every few days and finally the new male died at the end. I dont get it. All of the other fish in the tank are healthy and doing well.