1. Increased Size and Shape: As the pregnancy advances, the female guppy's belly will begin to grow and become noticeably swollen. Her body may appear more rounded, and her scales might protrude slightly.
2. Dark Spot: Look for a dark spot near the anal fin. This spot, known as the gravid spot, is a concentration of melanin and indicates that the female is carrying fertilized eggs. The gravid spot becomes more prominent and darker as the birthing time approaches.
3. Behavioral Changes: Pregnant guppies may display specific behavioral changes. They may become less active and spend more time hiding in sheltered areas of the aquarium, such as dense plants or behind decorations. They may also swim closer to the water surface, possibly seeking more oxygen.
4. Restlessness and Searching: As the birthing time draws near, the guppy may exhibit restlessness. She might swim rapidly, darting in different directions within the tank, or investigate various spots as if searching for a suitable location to give birth.
5. Appetite Changes: Guppies may experience a reduced appetite or a complete lack of interest in food in the days leading up to birth. This temporary loss of appetite is normal and should not be a cause for concern.
Remember, the exact timing of childbirth can vary among individual guppies. If you notice any of the signs mentioned above, be prepared for the imminent arrival of the fry (guppy babies). Provide the pregnant female with a clean, well-maintained aquarium, and consider offering her live or frozen brine shrimp as a nutritious treat to support her during this critical period.