DUMBO BETTA FISH
Technically not a type — they could appear with any tail shape — dumbo bettas are distinguished in their expanded pectoral fins. When viewed from front, these fins are able to look as the ears of an elephant.
Dumbo bettas are a development, and rosetails and feathertails may have a couple issues when bred. Since the pectorals can be tricky to float with, it is not a great idea to go to get a betta which also has a large tail.
It’ll be tricky for the bass to move about with that finnage, leading to stress and potential disease and biting. Take time to locate in case you wish to purchase one, somebody who strains dumbos with tails without branching!