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Chondrus crispus
This is a red seaweed called Carragheen Moss in
Ireland where it is eaten
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Serrated Wrack
Fucus serratus - a brown seaweed
covering much of the rocks between high and low tide
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Codium
Codium tomentosum - a green alga with
thick cylindrical stems.
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Enteromorpha
Grows
rapidly in the late spring and makes the rocks below the high tide
mark quite slippery.
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Dulse
This is a red edible seaweed
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Laver
Porphyra umbilicalis - used to make Laver Bread in Wales
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Furcellaria
another red seaweed
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Horn Weed
Flustra
foliacea
Not a seaweed at all
but a primitive animal belonging to the group Bryozoa.
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Kelp
Laminaria sacharina - the Kelps
and Oar weeds are very robust brown seaweeds firmly attached to the rocks by a
holdfast
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Kelp
Laminaria digitata
The stem or 'stipe' of this Kelp is very strong and flexible. They are only
broken away from the rocks by severe storms.
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Oar Weed
Saccorhiza polyschides
Another big 'Kelp' the Oarweed is easily identified by its bulbous base
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Bladder Wrack
Fucus vesiculosus has air filled
bladders which buoy up the fronds towards the light when they are
submerged. The swollen tips of the fronds are the reproductive
organs.
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Japanese Seaweed
an invasive and fast growing import from Japan, Sargassum
muticum may be washed up on the shore.
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Leathesia
Leathesia diformis is a hollow
brown sac-like seaweed often washed up on the beach
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Coral
Weed
Corallina officinalis - a red seaweed
whose fronds are impregnated with calcium carbonate absorbed from the sea water
giving it a 'coral' appearance.
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Sea Lettuce
Ulva lactuca - The Sea
Lettuce is a green seaweed commonly found in rock pools.
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Coelenterates - Sea Anemones
- These
are among the most primitive of animals belonging to the 'Jellyfish' group. They catch their tiny prey using stinging cells
on their tentacles.
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Dahlia Anemone
Tealia felina lives in the rock
pools below
the water level. Identified by the spots on its body.
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Beadlet Anemone
Actinia aquina lives in the rock pools, but is sometimes
exposed at low tide when it withdraws its tentacles
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Snakelocks Anemone
Anemonia sulcata
also lives in the rock pools. It has long brown tentacles.
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Annelids
- Bristle Worms: Some
are free swimming, but many live in tubes which are either cemented to
the rocks or buried in mud and sand. All sea anglers are familiar with
the lugworm which they often use as bait.
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Tube Worm
Pomatoceros trigueter lives in
a calcareous (chalky) tube cemented to the underside of rocks in rock pools.
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Tube Worm
Lanice conchilega
is a tube worm that lives in a tube made of mucus with attached sand
grains and a fringed end which sticks up out of the sand.
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Lug Worm
Arenicola marina
- The worm lives in a U-shaped burrow through which it wafts a current
of water. Its burrows are shown by the spiral 'worm casts' on the
surface of the mud or sand.
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