Tide pools
Why barnacles, limpets and sea anemones can live on a rock that is underwater for only part of the day.
Online courses in coastal science
Learn how the shoreline works
Short, readable course notes about the places where land meets sea: rocky pools, salt marshes, sandy beaches and the tides that shape them all.
Start with a habitat
Salt marshes
The grassy, flooded edges of sheltered coasts, and the work they quietly do for fish, water and storm defence.
Tides and the moon
A short unit on spring tides, neap tides and why the sea rises and falls twice a day.
How the notes work
Each unit is a single page you can read in about ten minutes. There are no accounts and no timetables. Read a unit, take a walk on a shore near you, and compare what you see with the notes.
Every unit ends with a short field exercise that needs nothing more than a notebook and a pencil.