Organisms in the intertidal zone
Littorina Periwinkles
Scientific name: Littorina
Higher classification: Littorinidae
Rank: Genus
Phylum: Mollusca
NB. There are at least 2 and possibly more species of periwinkle at our sites
Buccinidae Whelks
Trochoidea Top Shells
Scientific name: Trochidae
Phylum: Mollusca
Higher classification: Trochoidea
Rank: Family
Link to a guide to rocky shore organisms in UK. Many will be similar to those in tropical waters