Just three pics of the same shark egg case (‘mermaid’s purse) laid by a Nursehound (Scyliorhinus stellaris), also known as Large-spotted dogfish, Greater spotted dogfish or Bull huss. My camera was only five centimetres away from it (this technique is called ‘close focus wide angle‘). Mostly attached to perennial and tough Bushy rainbow wrack (Cystoseira tamariscifolia). 
An Bollenessor 
Absolutely stunning photos once again! You really are a cut above. Long time fan of native marine algae, so this blog is absolute heaven. I’ve always wanted an Aquarium to look like one of these shots…however the reality is that a lot of these seaweeds are difficult to grow in a tank, as you probably know. What a shame more people can’t enjoy temperate marine gardens! I live in Southsea, but really need to get down to Falmouth for some snorkelling and rock pooling…
Thanks again for your wonderful work 🙂
Thanks for your kind words Rich! cheers Mick