Of wave exposure - fully enclosed coasts with a fetch measured in tens or at most a few hundred metres (from Hiscock 1990).
In the shell valve of bivalve molluscs (e.g. cockles, mussels or clams), the strongly curving dorsal region following the beak (Stachowitsch, 1992).
Plural of 'umbo'.
Organisms occurring under the main canopy of algae, especially of kelps (from Hawkins & Jones, 1992).
Composed of a single branch, see biramous (Hayward & Ryland, 1995).
An informal physical term for the area of the shore around the high tide level.
Rounded and covered in spines, resembling a hedgehog. Cf. sea urchin.
Sixth abdominal appendages in malacostracan crustaceans (Ruppert & Barnes, 1994). In decapod crustaceans the paired uropods may be flattened and, together with the telson, form a characteristic 'tail-fan' (adapted from Stachowitsch, 1992).
Plural of 'uropod'.
A swollen, vesicular part of the thallus of macroalgae (Hoek van den et al.
Plural of 'utricle'.