It is a "Gravid Spot". Yes it indicates pregnacy.
With a guppy you need to look at the gravid spot. This is a dark spot in the fish's belly. A large gravid spot indicates the fish is likely to be pregnant. You can tell how pregnant the fish is by how large the spot is. Sorry I have no experience with other species.
You have said she has a gravid spot (not gravel). That indicates that she is gravid (pregnant). She would not have that spot is she was not gravid. Be patient. Provided she is in suitable conditions she will have her youngsters eventually.
A graviid spot is a dark grey spot at the back of the stomach. It is a sign to tell you that your fish is pregnant
To determine if your platy fish is pregnant, look for a swollen abdomen, dark spot near the back fin (gravid spot), and a boxy or square appearance. Pregnant platy fish may also exhibit changes in behavior, such as increased hiding or aggression.
Signs that a platy fish is pregnant include a swollen abdomen, dark spot near the anal fin (gravid spot), increased appetite, and behavior changes such as hiding or seeking isolation.
A sunburst platy fish may be pregnant if it has a swollen belly and a dark spot near its anal fin, which are signs of pregnancy in this species.
Signs of a pregnant fish include a swollen abdomen, changes in behavior such as increased appetite or aggression, and a darkened gravid spot near the anal fin.
The gravid spot on a platy fish is a dark spot near the fish's anal fin that indicates pregnancy. It is caused by the darkening of the skin due to the developing embryos inside the female fish. By observing the size and darkness of the gravid spot, one can determine the reproductive status of the fish and whether it is pregnant or not.
White fish tank gravel in an aquarium setup provides a clean and bright aesthetic, enhances the visibility of fish and plants, and reflects light to create a vibrant underwater environment. Additionally, white gravel can make it easier to spot debris and waste, promoting better maintenance and water quality in the aquarium.
To determine if a fish is pregnant, look for signs such as a swollen abdomen, changes in behavior, and a darker gravid spot near the anal vent. Pregnant fish may also exhibit increased appetite and aggression.
Signs that indicate a platy fish is pregnant include a swollen abdomen, dark spot near the anal fin (gravid spot), changes in behavior such as increased hiding or aggression, and a more rounded appearance overall.
A pregnant platy fish will have a noticeably swollen belly, often appearing rounder and larger than usual. You may also see a dark spot near the fish's anal fin, which is the gravid spot where the developing babies are visible. Additionally, a pregnant platy fish may exhibit changes in behavior, such as increased hiding or aggression towards other fish.