science

People eat a lot of fish. Different sex-changing fish can follow several signals that prompt them to change sex. Some change from female to male at a fixed size or age. Often, fisheries will only harvest fish over a certain size. This means catching more males because they are usually bigger, which then skews the population towards female. Not enough males are then available to fertilise all the eggs produced by the females.

99.8% of shark fins come from Indo-Pacific: conservation efforts in Atlantic Ocean are working

Researchers find dolphins to be far more similar to humans than previously thought. For those who have ever observed monkeys and apes – our closest evolutionary cousins – in the wild, in a zoo,...

What happens to baby turtles after they scramble off the sandy beaches where they are born and swim into the open ocean?

Restoring whale numbers would mean more iron in the water from their poo, which would mean more phytoplankton, and more carbon dioxide taken up from the atmosphere. Whales once contributed to as much carbon removal as forests of entire continents.

Take your citizen science to the next level with Operation Oyster. Divers are asked to incorporate oyster data gathering into their regular diving activities throughout the year.

Stingrays can calculate. Scientists have trained the rays to do simple adding and subtracting. (They learned addition quicker, just like children do.)

Marine biologist Anna Sobral founded Manta Catalog Azores in 2012 to develop understanding of manta and devil rays. The Azores is one of the few places that these rays are known to congregate: the large Sicklefin devil...

We talk to Nuria Baylina about making the Manta Ray Azores project self-sufficient with the help of holidaying scuba divers.

Take part in the Shark Trust's community science project and to help gather vital information about global shark distribution. During the last week in July 2022 they want buddy pairs, dive centres, clubs and boats to record...