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The application of the term "species complex" in Astyanax is discussed from a cytotaxonomic viewpoint. Characins comprise many species of small fishes of the genus Astyanax. They are widespread from ...

Brachychalcinus aff. reisi (non Garcia-Ayala, Ohara, Pastana & Benine, 2017). ―Garcia-Ayala et al., 2017:571 (rio Tapajós basin; comparative material). ―Garcia ...

Otters are adorable creatures that triple in cuteness when they become mothers. Their young, called pups, are the definition of cute. As all good mothers are, otters are ferocious when it comes to ...

1 Department of Ecology, Jinan University, Guangzhou, China 2 College of Biology and the Environment, Nanjing Forestry University, Nanjing, China - The first complete mitogenomes of Hemigrammus ...

The difference here is striking. On each occasion, over 100 individual electric eels aggregated and started swimming in circles, effectively herding groups of smaller fish, mostly characins, into a ...

While she’s occupied, the male sidles across and impregnates her with his sperm. Unlike many other fish, which shoot sperm and eggs into the water, characins fertilise each other internally, just like ...

image: Talk about a bait-and-switch. Male representatives of the tropical fish known as swordtail characins have flag-like sex ornaments that catch mates just like the bait on a fishing rod would.