Male blue-lined octopi (Hapalochlaena fasciata) have been found to use venom on their sexual partners, as well as for the usual reasons of defense against predators and subduing prey.

Before mating, male blue-lined octopuses poison female octopuses to avoid being eaten. Wen-Sung Chung/University of Queensland But now, research reveals, males have evolved to use a venom called ...

A male blue-lined octopus often becomes their partner's meal after mating but the University of Queensland's Fabio Cortesi tells NPR's Ayesha Rascoe some males have found a way to survive.

To deal with this shortage of Blue Crabs, the Department of Natural Resources has issued new restrictions, including on male Blue Crabs, which previously were unregulated.

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Since male blue-lined octopuses mate just once in their lifetimes, it’s not entirely clear what they stand to gain, evolutionarily speaking, by using the toxin to avoid being eaten.

In addition, the blue crab harvest will end on Nov. 30, two weeks earlier than normal, in an attempt to bolster the crab population.

The proportion of male Blue Moon butterflies dropped to a precarious 1 percent as the parasite targeted males. Then, within the span of a mere 10 generations, the males evolved an immunity that ...

The stunning male indigo bunting is a dazzling, electric blue. One of the most breathtaking sights I’ve ever seen in my DeKalb County yard was a vivid male blue bunting next to some neon-bright ...

Both female and male blue tits contribute to the feeding of young. Kaspar Delhey In general, differential allocation is expected from, and studied on, females.