How long does the father seahorse carry the eggs?
Up to 3 to 6 Months
Barbs, including the green tiger barb, are external free spawners. This means that they do not carry fertilized eggs, but that the eggs are fertilized externally. Females will develop eggs when they are in good condition; meaning good water quality and well fed. Essentially they will carry eggs until they are triggered to spawn. If they are not triggered to spawn, the eggs will often be re-absorbed and used and nourishment.
They will normally only spawn once a year. The female Koi start to come into breeding condition as their water temperature rises above 60F. Then they will carry their eggs either for as long as it takes for them to be spawned out by a male or the temperature starts to go down below 60F again. When the temperature drops the eggs are reabsorbed by their body before late autumn and winter set in.
Female lobsters carry their eggs (known as berries) beneath their abdomen, attached to structures called spinnerets. The number of eggs is related to the size of the female, and is typically about 5,000 eggs for a 10 in (25 cm) long female, and 40,000 for a 14 in (36 cm) long animal. However, one 17 in (43 cm) long female had 63,000 eggs, and another slightly larger one had 97,000.
They don't carry their young. Catfish, like most fish, lay eggs that are fertilized outside the body. Catfish males, however, make a nest, and watch over a fertilized clutch of eggs for their 6 to 10 days of incubation, deterring predators and stirring the water to improve oxygen going to the eggs. After the eggs hatch, he will continue to watch over the hatchlings for several days until they swim away.
Goldfish are not livebearers so they are never truly prenant. After the female goldfish lays her eggs a nearby male will release a cloud of milt and fertilize the eggs. After this if the mother and father goldfish are not removed from the eggs the eggs will be eaten. So in short a goldfish does not and should not stay with its mother.