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).

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.