Salmon can live in freshwater and saltwater and migrates when it is full grown.
Fish migrate back to their birthplace to ley their eggs. If you take a fish from its natural environment and put it in a fish hatery it wont ley eggs. Fish have a sense so they remember were they were born.
The cells take in salt to balance the solute concentration-apex
Depends on the type of fish , anywhere from .22oz. to 1lb. unless your speeking about saltwater fish such as the tiger shark they give live birth and at birth young can weigh anywhere from six to ten pounds
Glofish are a variation of the Zebrafish. Zebrafish do not give live birth, so neither do glofish. But on the otherhand, if you want fish that give live birth: Guppies, Mollies, Platies, and Swordtails give live birth. (These are all Freshwater)
Freshwater swordtails don't lay eggs. They are from the family of livebearers. That means that they give birth to live babies.
a fish (any breed)
Piranha is a freshwater fish, all of which lay eggs. Marine mammals give birth to live babies.
Swordtail freshwater tropical or what? Freshwater ones don't lay eggs they give birth to live fry you can tell when they are pregnant because of the fact they get fatter and if you look at the stomach area you can see black dots.
Saltwater Crocodiles normally live alone although the babies may live in groups. Some male saltwater crocodiles hunt in groups to bring down very large prey like rhinos, elephants and great white sharks.
No, they lay their eggs if fertilized, in a pebble bed in the river, in which they were themselves born.
Usually a baby can run after a few hours after birth but may spend a couple of days laid down being protected by its mum, until it has had enough milk and is strong enough to follow the herd over great distances.
because it give birth to young alive Guppys are livebearers.