On 8-9th May we carried out the bi-annual fish sampling on the Severn Estuary at Arlingham. This is no simple task as not only is the river very wide, it’s also tidal, rising and falling many metres twice a day.
We use fyke nets. These are like a long narrowing tube with the wide end pointing upstream. Fish swim into the net and can’t escape. They have special attachments in the mouth to prevent otters entering and getting trapped.