Huge sea potato

April 1st 2018

The fragile shells or tests of sea potatoes or heart urchins are regularly found on Assynt beaches, but I have never before seen one as large as this.  It was collected from the eastern shore of Oldany Island (NC0934) by Wendy Glover, after she and Steve Collie had canoed across on 4th March 2018.

Sea potatoes are recorded up to 90mm, the length of this one.  Much more usual are examples up to 40mm, like the other shown here, which, by coincidence, Gwen Richards and I found at Achmelvich the same day.

These tests have lost their ‘furry’ coating of recumbent spines, which in life help them to burrow down to 150mm beneath the sandy seabeds which are their natural habitat.  They are one of the commoner examples, on local shores, of the echinoderms, a large group of exclusively marine organisms, uniquely 5-radiate in design, which also include starfish, brittle stars and sea cucumbers.

Ian Evans

Report a Sighting

Recent Sightings

Manx Shearwater

27 birds off Bay of Clachtoll (DAH) (16/06)

Harbour Porpoise

Mother and calf off Stoer Head Lighthouse (DAH) (15/06)

Small Magpie moth (Anania hortulata)

Single moth in garden, Culkein Drumbeg (DAH). This is only the second ever record of this micro moth in the West Sutherland recording area, VC108. The first record was on 1st June this year in the garden of the County Moth Recorder in Melvich on the north coast. However, this does make it the first ever record for Assynt. Photo Gallery - Moths. (14/06)

Golden Plover

Eight birds over Clachtoll (DAH) (13/06)

Peregrine

Single bird flying over garden, Ardvar (Beccy Garvey) (12/06)

Small Pearl-bordered Fritillary

Single butterfly, Nedd (Stefan Taylor) (12/06)

Small Pearl-bordered Fritillary

Single butterfly recently emerged at Glen Leraig (AS) (11/06)

Barn Owl

Single bird hunting over croft land, near Stoer primary school (Jane Livingstone) (11/06)

Map