BBC: Increasing numbers of exotic species such as bluefin tuna will appear off the Cornish coast amid warmer sea temperatures, scientists predict.
Temperatures are hitting 18C in Devon and Cornwall, nearly 2C more than normal for this time of year.
Plymouth Marine Laboratory said warmer water species such as sunfish could also be migrating into English waters.
The Met Office said winter storms had helped lead to an increase in summer sea temperatures.
Forecaster Alister McHardy said: "The...