Determining whether a fish is pregnant can be crucial for various reasons, including selective breeding, population control, and providing appropriate care. Several signs and methods can help identify pregnancy in fish, ranging from physical changes to behavioral cues.
One of the most noticeable physical changes in pregnant fish is an enlarged abdomen. As the eggs develop inside the female, her belly will gradually swell, becoming more rounded and firm. This swelling is particularly evident when viewed from above. Additionally, the gravid spot, a dark spot near the anal fin, may become more prominent and swollen as pregnancy progresses.