Male Betta Fish can vary greatly in color, body shape, fin length and shape and tail type. On average they tend to be larger than females and typically possess more elongated bodies with vibrant colors and longer fins than their counterparts. When competing for territory or mating they can become aggressive towards each other and even fin nip one another which makes multiple male betta fish in one tank only recommended when breeding purposes arises.
Female bettas may not be as territorial or aggressive, yet they still can fight to establish their territory and have been known to nibble at other fish with long fins such as tiger barbs. With multiple female bettas living together peacefully they should soon form a pecking order which they should adhere to; you may need to add hiding spaces or plants into their tank in order for them to feel secure and safe.
Male Betta fish typically create bubble nests, though sometimes females do too. Females can usually be identified by their egg spot, which is a small white dot behind the ventral fin (underside front fin). This spot serves as the ovipositor or egg-laying location. Mature females will typically display head down posture when flaring to signal they are ready for mating.
