All Aquariums recommends a mix of 1 male guppy to 2-3 female ... plan for a big bunch of babies! Tiny, neon-colored, and generally adaptable, neon tetras make for popular aquarium fish.

Cardinal tetras mainly communicate with body motions ... They are biparental, which means both the male and the female look after the babies together. While the males have caregiving skills ...

If you're looking for colorful tropical fish to brighten up your aquarium, look no further than the striking neon ... one male with several females. That being said, they can still live in a community ...

It has 88 pages of easy-to-read texts and colorful illustrations of fish such as goldfish, neon tetras, great white sharks ... by a marine artist and each illustration shows both male and female ...

A recent Trump executive order defines sex based on gamete size. But the order oversimplifies genetics, hormones and reproductive biology.

Some male octopuses tend to get eaten by their sexual partners, but male blue-lined octopuses avoid this fate with help from ...

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Scientists observed male blue-lined octopuses injecting tetrodotoxin into females, which rendered them immobile for mating ...

The guidance states that it "recognizes there are only two sexes: male and female. HHS will use these definitions and promote policies acknowledging that women are biologically female and men are ...

The memo defines terms such as sex − "a person's immutable biological classification as either male or female" − and female versus male. Kennedy's announcement comes a week after he was ...