In rock pool on beach
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Graham - I have agreed. I wonder why no-one else has.
The best lookalike is here
One has to be careful with WebIDs as there are a LOT of errors but this one is from the conchsoc who you'd expect to be right.
I find them really interesting creatures and knew nothing of them until iSpot.
I must say though, they are not all that easy to separate.
You may wish to update the ID to include the word CHITON see
you can then adding some (of your own) notes which might be useful for future spotters.
Lat/Lng: 51.7239, -4.6828
OS grid ref: SN147062