The Environment Agency is patrolling the River Severn to watch out for elver poachers.
They're using boats with special imaging equipment so they can see in the dark. Other officers patrol the banks.
The baby eels are a delicacy in the Far East and can command a high price, but fishing is strictly controlled. Anyone doing it without a permit can be prosecuted.
Bill Burleigh is an Environment Agency Fisheries Officer:
More top news
More than a hundred pairs of shoes have been laid out on College Green in Bristol in protest at the lack of funding for research into ME
A teenager from Wiltshire, whose family recently adopted a child, is urging other families to open their doors to foster children.
Exeter MP Ben Bradshaw says the infighting needs to stop if Labour are going to lead a fightback across our region.