While most fish reproduce by laying eggs, some species are live-bearing, or viviparous, and carry their offspring internally.

(Tiffany Ernst via SWNS) Viviparous species include popular aquarium fish such as guppy, molly and platy. Study author Tiffany Ernst said: “We wanted to see if these pregnancy-related changes in ...

Pregnant fish can also get “baby brain" - just like human moms-to-be, according to a study. Pregnancy-related brain impairment is present in live-bearing fish, say scientists. Their research ...