The endangered spiny seahorse has recolonised its former stronghold in Dorset due to the coronavirus lockdown, marine conservationists say.
During one regular survey dive at Studland Bay, the Seahorse Trust found 16 seahorses including pregnant males and a juvenile that had been born this year.
This is the largest number found in a single dive on the site since the charity began monitoring there in 2008.
Prior to this, a seahorse had not been seen at the site for two years.
Neil Garrick-Maidment, who founded the Seahorse Trust, puts the increase down to the reduction in people, boat traffic and associated noise and anchors in the area due to lockdown measures.
‘The ecology of the site has made a remarkable recovery,’ he said.
‘We have seen so many seahorses because the food chain has recovered, giving seahorses plenty of food to eat, and crucially, somewhere to hide.
‘The seagrass has started to repair itself, and the spiny seahorses have taken advantage of this.’
Both of the UK’s native seahorse species – the spiny and the short snouted – were granted protected status in 2008 under the Wildlife and Countryside Act.
Following years of campaigning, Studland Bay was finally designated as a Marine Conservation Zone last year in recognition of the importance of its seagrass habitat and seahorse population.
Mr Garrick-Maidment said: ‘The question is how we go forward.
‘We do not want boats and divers banned, but the seahorses and seagrass do need their legal protection enforced.
‘The 16 seahorses discovered on a single dive are an amazing discovery, but we now need the Marine Management Organisation (MMO) and Natural England to enforce the Wildlife and Countryside Act and the Marine Conservation Zone and put in place measures such as environmentally friendly moorings.
‘The seahorses need protection to stop them being disturbed again as Covid restrictions are lifted, and to stop them vanishing from this legally protected site.
‘We have a unique opportunity to help nature and to restore the balance of our planet.
‘We must grab this with both hands, for the seagrass, for the sea, for humanity and crucially for these incredible seahorses.’