Finding the Flapper Skate

How Seasearch Divers helped identify the location of a new protected area for Flapper Skate

A flapper skate, a large ray with white mottled markings in blue coloured water

The flapper skate story

The flapper skate (Dipturus intermedius) is a Critically Endangered species that occurs largely in the northern North Sea and off Scotland’s northwest coast.

Little is known about flapper skate breeding grounds and breeding habits due to their rarity. However it is recognised that their eggs take around 18 months to hatch, making them sensitive to seabed disturbance.

 Seasearch  is a project where recreational divers and snorkellers collect and submit data about the marine environment. Volunteers taking part in Seasearch have been instrumental in improving the understanding of, and protecting, flapper skate habitat in Scotland.

A large flapper skate lies on the deck of a boat while two people place a tape measure along its length
A large flapper skate lies on the deck of a boat while two people place a tape measure along its length

Flapper skate distribution

Flapper skate records available on  NBN Atlas Scotland  show the limited information available on the distribution of this species.

Seasearch is a data partner of the NBN Atlas, and observations from their volunteers are contributing to filling in data gaps for the flapper skate.

A map of Scotland with a small number of orange markers around Orkney and the west coast indicating records for flapper skate
A map of Scotland with a small number of orange markers around Orkney and the west coast indicating records for flapper skate

Discovering a new breeding ground

Flapper egg cases were discovered in high numbers at Red Rocks, off the Isle of Skye, in 2019.

Seasearch volunteers were involved in recording and documentation of the habitat in which these egg cases occurred

The site where they were found was adjacent to fishing areas and potentially vulnerable to seabed dredging.

Light from underwater equipment shines on a flapper egg case resting on a sandy patch of seabed and surrounded by rocks
Light from underwater equipment shines on a flapper egg case resting on a sandy patch of seabed and surrounded by rocks

A new Marine Protected Area for flapper skate

After documenting the breeding ground for flapper skate found at Red Rocks, an urgent Marine Protected Area (MPA) was declared in March 2021.

Further surveys in 2021 discovered a large numbers of flapper skate egg cases outside the urgent MPA boundary.

Following further consultation, the original site was revoked and an extended site was urgently designated on 16 December 2021. Permanent designation and protection for the MPA came into force on 9 February 2023.

The contribution of Seasearch volunteers demonstrates the crucial role that volunteer recorders can play in providing the evidence needed to protect some of Scotland's most endangered species.

A map showing islands off the Isle of Skye with an area marked with purple hatching that shows the designated Marine Protected Area for flapper skate
A map showing islands off the Isle of Skye with an area marked with purple hatching that shows the designated Marine Protected Area for flapper skate

Seasearch thanks all their supporters, in particular the support of NatureScot for Seasearch in Scotland is gratefully acknowledged.