Clownfish acting weird
We have a 180 gallon salt water tank. Only had it about 6 months. We lost several fish, then find a hairy crab hiding, he is now gone. But our clownfish they have never mated that we know of. They came with the tank. One orange (this is the bigger of the two) other black. The orange one has been acting weird. It has been swimming around the coral with it's head up like it's looking for something. They never use to go far from the anemone it has not been going into the anemone much lately. Any ideas what's going on.