Markham's Triangle

Site overview: This site is located 137km from the Humberside coastline in the East of England, with depth ranges between 30-50m, and lies next to the Cleaverbank Special Area of Conservation, another type of Marine Protected Area. It is known that the harbour porpoise, grey seal and harbour seal all live in this area. Worms dig into the seabed here, and in turn are a good food source for crabs, seals and dolphins.

At risk:  ! This site is at risk, it currently is not designated as a Marine Protected Area - but should be. Decision makers in England will determine in 2017 if this site should be protected, make sure your voice is heard. Take action to ensure this site becomes a properly protected area.

Designation Status
Last Updated
6 June 2017
MPA Type
Marine Conservation Zone
MPA Purpose
to protect nationally important marine wildlife, habitats, geology and geomorphology


53° 56' 36" North,
2° 44' 11" East

Surface Area

200.17 km2
(77.28 mi.2 )


71.95 km
(44.71 mi.)

Iconic features protected by this site