The Lyons Share

How can you beat a Rainbow Sea Slug?

Posted by Graeme Lyons , Friday, 7 November 2025 16:26

With an even bigger and brighter Rainbow Sea Slug Babakina anadoni! Today we went to Gylly Beach and this was spotted by one of the rock poolers. It was so much brighter and bluer than yesterday's animal. What a wonder!

Finley found four swirls of eggs under a large rock before it was found nearby under a much smaller rock.

Then it started munching on Candelabrum cocksii, the weird worm-like hydroid that is feeds on.

I found another Limacia clavigera under the second rock I turned and finally found another three! Noy scarce bit this shot was much better than the one I took yesterday.

As the tide was coming in, I saw a gully with a flow of water. I said to Ty that you often get nudis where there is some flow and turned a large rock to find two adult Spurilla neapolitana and their eggs!!! The 19th and 20th record in the UK I think. The first one had really orange rhinophores. Just magic. So glad that Ty, Sally and everyone else got to see these again we mopped up yesterday.

Posted in coastal, Falmouth, Gylly Reef, sea slugs

2 Response to "How can you beat a Rainbow Sea Slug?"

Rachel Edworthy Says:

Hi Graeme- Rachel here (I can’t remember if I gave you my name at all after finding the guy but I way so hypnotised by what a beauty it was I imagine not!), but is there any chance you could send any of the footage (even if it’s just a snippet of the clip) of it munching away? It’s very cute! Vicky and Finley have my wattsap if it would help to go through that route?

7 November 2025 at 19:24

Rachel Edworthy Says:

Oh and amazing photos by the way!!

7 November 2025 at 19:25