barky's picture


Observed: 10th March 2012 By: barky
collection of seaweeds

Can anyone identify these sea weeds? I think one is kelp and the bright green one is sea lettuce.

Species interactions

No interactions present.


gramandy's picture

white and black seaweed

likely also to be laminaria at different stages of decay. Red seaweed anyone's guess - calliblepharis possibly.

Nature girl's picture

Welcome to iSpot :)

I agree with your and gramandy's IDs, except that the green seaweed might not be Sea Lettuce it could be one of the other Ulva species (I think you need a microscope to separate them...).

Perhaps in future you could post each species separately because there can only be one 'likely ID' for each post. Keep the marine observations coming; it's always nice to see more of them on the site.

JoC's picture

Saccorhiza polyschides.

I think this is Saccorhiza polyschides. The very flat, wide stipe with a wavy-curled margin towards the base would suggest S. polyschides rather than a Laminarian.
Older specimens have a large, hollow, warty holdfast which is missing in this specimen. Typically a sub-tidal species from Dorset westwards.


gramandy's picture

look at holdfast...

would be curly if S.poly - not large enough.