Tom Daley has said the Olympic diving pool being a mysterious shade of green helps them dive as they "know which way is up".

The 22-year-old Plymouth star, told ITV News he didn't know why the pool was green and joked that maybe "Shrek has been in the pool".

Tom Daley and Dan Goodfellow’s took home a bronze medal for their dives on Monday.

The pool turned green yesterday, with many viewers pointing out the vastly different colours of the bright blue swimming pool and the green diving pool.

When you're spinning around diving, outdoor diving can be difficult because the sky is blue and the water's blue, so you don't know which way is up. Now that the water's green it makes it slightly easier to see where you are

Tom Daley
Credit: Felix KÀstle/DPA

Dan Goodfellow added that doctors had told them the water was safe.

The Olympic Games organisers said the pool would change back to being blue, blaming a drop in alkalinity levels for an uninviting green hue during competition on Tuesday.

The rain affected a bit the changes in the state of the water. It should go back to classic blue colour during the day.

Mario Andrada, Games spokesman
Credit: Mike Egerton/PA