Individual fish can be identified based on their behaviour and movements
Individual fish can be identified based on their behaviour and movements

Fish in study can be identified based on their movement and behaviour

This finding was based on research by a team of biologists and mathematicians from Swansea University and the University of Essex. It involved 15 three-spined stickleback fish observed individually in a fish tank containing two, three or five plants in fixed positions.

Using high-resolution tracking data from video recording, the scientists made their observations on the following parameters: movement (time stationary, step length, turning angle and burst frequency) and behaviorial (distance travelled, space use, time in free water and time near objects).

Last chance to enter 2021 'Underbathwater Photographer of the Year' competition

Fourth Element - the UK-based thermal protection manufacturer - came up with the idea in April 2020 with the aim of lifting divers' spirits, whilst they remained at home during the first British Government lockdown.

The idea was simple. Take the best photo you can underwater in your bathtub. And if you don't have a bath, just get creative. A sink, bucket, water butt or just about anything that can hold water was perfectly acceptable. 

A whitespotted eagle ray gliding through the waters
A whitespotted eagle ray gliding through the waters

Where eagle rays spread their wings in US waters

Until recently, the geographic wanderings of the whitespotted eagle ray have always been a mystery.

Now, in a study that took place from 2016 to 2018, a team of researchers have started to unlock some of its movement patterns.

The 54 rays in the study were tagged with acoustic transmitters, along both the Gulf of Mexico and the Atlantic coast of Florida, using collaborative acoustic telemetry networks.