According to Australia's Commonwealth Scientific and Industrial Research Organisation (CSIRO), there are no reliable estimates of white shark population sizes or trends in Australian waters, but genetic evidence suggests there are two populations,
The sixgill sharks are a genus, Hexanchus, of deepwater sharks characterized by a broad, pointed head, six pairs of gill slits, comb-like, yellow lower teeth, and a long tail.
We showed that the sixgills in the Atlantic are actually very different from the ones in the Indian and Pacific Oceans on a molecular level, to the point where it is obvious that they’re a different species even though they look very
As darkness fell, a small nurse shark would appear, attach itself to a scrap, and rest there, its wide fins stirring, as it adjusted its position to feed. Soon, more would materialize from the dim surroundings and drift in uneven circles.Read more
Multiple paternity occurs when a single brood of offspring is fertilized by multiple males. Multiple mating by females is referred to as polyandry and is one mating strategy widely documented to increase the genetic quality of offspring.Read more
After studying 611 fishes from different sites in Rowley Shoals and Scott Reefs in northwest Australia, scientists discovered that having fewer sharks around caused the fishes in the vicinity to develop smaller eyes and tails.Read more
Being a seal swimming in the ocean surrounded by great white sharks is definitely stressful. In a three-year study, researchers sought to find out whether living in high-stress conditions can have an impact on the seal population.Read more
A new study states that almost a third of the shark species in the global fin trade are threatened with extinction. This is the first study to estimate the number of species in the fin trade and categorise them according to extinction risk.Read more