s A Field Guide to the British Seaweeds - NMBAQC

Leathesia difformis
Plant spherical, bulbous and hollow, gelatinous
and can be easily squashed, but slightly more
solid when young. Often found growing on other
algae particularly Osmundea and Corallina but
may also form dense patches on open rock
surfaces and on the sides of rockpools. Found
throughout the mid and lower littoral areas and
can grow up to 5cm long/wide. Not to be
confused with Colpomenia sp.
Plant bulbous
and hollow
Plant made up of
numerous filaments
with reproductive
bodies appearing as
dark spherical patches
Growing on solid substrate
and within crevices, and
found in rockpools