Livebearer fish are some of the most fascinating marine creatures. Instead of laying eggs, they produce fully formed live ...

Both are popular aquarium pets. ... Size matters: To livebearer fish, big fins are a big deal. ScienceDaily. Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2019 / 01 / 190117142135.htm.

Size matters -- To livebearer fish, big fins are a big deal Females love males with big dorsal fins, but the appendages first evolved for males to fight other males ...