I couldn't find any threads on here about betta anatomy and it
seems like common questions occur when people ask what are
ventrals or what is the caudal. Maybe this can clear it up a
little bit! :) All credits go to bettacare101.com! The dorsal
fin is located on the top of the fish and is used for stability
when swimming through the water so that your betta can swim in a
straigth line. Without it, your betta would stuggle to swim
straight and have a hard time getting to where it needs to go.
The caudal fin in bettas come in many shapes which define each
type of betta such as halfmoons, crowntails, plakats, etc. They
also provide the power and sudden bursts, and act as a rudder
for turning. However, the lengthening of the caudal fins in
bettas causes them to be slow swimmers and the large fins act as
parachutes in that they easily catch the water currents from
filters and the betta gets pushed around the tank. The anal fin
is located on the bottom side of the betta between the pelvic
(ventral) fins and the cau