Deltas Tails are very similar to Halfmoons but have less than a 180 spread when flared. Deltas are far less than
| Delta Tail Betta | |
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| Information | |
| Originated From: | Thailand |
| Approximate Petstore Cost: | $12.00 |
| Fin Type: | See Below |
an Halfmoon. Deltas are differentiated from Veil Tails by the fact that if you drew a line from the nose to the tip of the caudal fin on a Delta there would be an equal amount of fin on either side of the line, whereas on a Veil Tail there would be little tail at the top, and the majority below. The Delta tail has a triangular-shaped caudal fin.
(Taken from here)