the betta i have got is a bright red one ,but it keeps changing to nearly black then back again only last a few seconds but keeps doing it, tank about two weeks old , seen articals saying about the mood the fish is in but i don't know what mood is .hope anyone can help :)
Don't know what mood is? Color morphing is the one of the way's the fish tells us what he is feeling. Many times during breeding, colors will become mor vivid. Fright patterns are sometimes displaye as "barring up". The fish will display verticle or horizontal bars in order to make itself "camoflauged" into its surroundings. Sometimes a fish will darken up when stressed. It all depends upon the individual fish and is something you will need to get to know your fish and its habits and "moods".