Little yellow fish have been painted next to many of the drains in Teignmouth. The Environment Agency has sprayed them as part of a campaign to prevent people pouring waste down them, particularly fat.
They're storm water drains that discharge straight into the sea, so any other waste will pollute the local waters.
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More than 2,000 young people are gathering on Dartmoor today ready to take part in the Ten Tors challenge.
Alex has your forecast: Mild start to Friday with good sunny spells.
Temperatures will continue to rise, with hazy sunshine