The cartilaginous elephant shark has a basal phylogenetic position useful for understanding jawed vertebrate evolution. Survey sequencing of its genome identified four Hox clusters, suggesting that, ...

What is the origin of the ancestors of present-day fish? What species evolved from them? A 50-year-old scientific controversy revolved around the question of which group, the "bony-tongues" or the ...

For her doctorate, Janicke Nordgreen has studied nociception and pain in teleost fish. Her conclusion is that it is very likely the fish feel pain. In her dissertation Nordgreen has studied the ...

Teleost fish possess a sophisticated immune system that integrates innate and adaptive mechanisms to detect, respond to and eliminate pathogens in diverse aquatic environments. Innate defences include ...

Teleost fish deploy a sophisticated mucosal immune system at their body surfaces—including gut, gills, skin and nasal passages—that balances defence against pathogens with tolerance of commensal ...

The most common lineages of fish found today in oceans, lakes, and rivers evolved about the same time as mammals and birds, a new Yale University-led study shows. A genetic analysis by Yale ...

The three-spined stickleback (Gasterosteus aculeatus) is a teleost fish that has undergone rapid adaptive evolution and speciation within the last 15,000 years. The benthic species has greatly reduced ...

The face is the most important area on the human body for visually differentiating between individuals. When encountering another person, humans initially gaze at and perceive the face holistically, ...

Understanding the evolutionary history of species through their relatedness is an essential issue and regularly the subject of scientific controversy. One of them concerns the position, in the tree of ...