29 Patella pellucida. Length 8.3mm. Growth Stage 4 holdfast dweller (GS4h). March 2017. West Anglesey, Wales.

29 Patella pellucida.  Length 8.3mm. Growth Stage 4 holdfast dweller (GS4h). March 2017.  West Anglesey, Wales.

Same specimen as in image 32 Patella pellucida. Length 8.3mm. Growth Stage 4 holdfast dweller (GS4h). March 2017. West Anglesey, Wales.
Left: occupied holdfast, many tendrils cut away to expose it.
Right: occupant removed. Bowl-shaped pit is usually centred on the pale, nutrient rich core of the stipe.

Concise
Part 1, SHELL FORMS: 02 Patella pellucida. Growth Stage 2 (GS2). July 2012. Littoral. North Yorkshire, England. © P. Lightfoot.
Part 2, BODY & ANATOMY: 03 Patella pellucida. Growth Stage 3 (GS3). 2009. Sublittoral, Farne Islands, Northumberland, England. © P.Lightfoot.
Part, 3 HABITS & ECOLOGY: 04 Patella pellucida. Length 4.6mm. Growth Stage 3 (GS3). September 2016. Yorkshire, England. © P.Lightfoot.