Commonest bivalves on a beach yesterday (clockwise from top left) :

Seven x Cerastoderma edule
Seven x Lucinoma borealis
Five x Chamelea gallina (?)
One Spisula solida
One Arctica islandica

These shells are found on many sandy beaches in the Ross of Mull, but the relative abundances vary a lot from place to place, even on apparently similar beaches near to each other... @dantheclamman

#Shells #Mull #Conchology #Biominerals

Nice example of a sponge-bored limpet shell from Uisken beach. (Probalby Cliona celata)

The geologist Thomas John Jehu wrote an excellent paper on British Isles rock and shell-boring organisms in 1918. Alas, it doesn't seem to be available in any public online archives, despite being 107 years old. Here's the ref anyway: https://doi.org/10.1080/14702541808554748

#Limpet #Boring #Mull #Conchology #Shell #sponge @Cormac_McGinley

St. Brandon (Biodiversity 🦗)

Saint Brandon, also known as the Cargados Carajos Shoals, is a southwest Indian Ocean archipelago of sand banks, shoals and islets belonging to the Republic of Mauritius. It lies about 430 km northeast of the island of Mauritius. It consists of five island groups, with about 28-40 islands and islets in total, depending on seasonal storms and re...

https://en.wikipedia.org/wiki/St._Brandon

#StBrandon #Conchology #FlyFishing #Biodiversity #FisheriesLaw #Oceanography