How warming seas are altering our underwater world

Beneath the surface of the ocean is a world filled with a vast array of fauna and flora but scientists say "somewhat unusual" changes are taking place. Intensified by a marine heatwave in May, they say waters off the south coast of England are getting warmer and disrupting the food chain.

"I'm not a scientist or anything like that," said Cornish snorkeler and underwater photographer Heather Hamilton.

"But because I've been in the sea so much over the last 20-odd years, I have seen changes, especially in the last two years."

Ms Hamilton runs a blog and Instagram page documenting the different species she sees in Cornwall, including different species of jellyfish as well as increases in octopus numbers.

She said the changes had also left her with a "mixture of emotions" from excitement to concern.

"You've got in the back of your mind, 'Is this a good thing":[]}