The hybrid freshwater fish actually reproduces exclusively female clones, doing so for much longer than scientists thought ...

Some species of fish can evolve their egg-laying habits in response to predators in the area in order to survive, according to new research. Some species of fish can evolve their egg-laying habits in ...

In times of desperation, female sawtooth sharks have been known to reproduce sans males. For other species, solo reproduction is downright vanilla. blickwinkel / Alamy When it comes to getting ...

Ranging in size from about 2 to 6 inches, the killifish are ideal for evolutionary studies because they are highly adaptable to their surroundings. Some types of killifish are even known to be ...