While a dominant male fish from northern Mexico mates with a female, a small fella bides his time in the offing. Suddenly, the little guy darts in ahead of Mr. Big and plants his seeds on freshly laid ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. This voice experience is generated by AI. Learn more. This ...

Goldfish “cuddling” is often a sign of breeding behavior, where one fish closely follows or nudges another as part of mating and chasing. In some cases, it can also happen due to stress, overcrowding, ...