• Snorkel Instructor

    BSAC Qualified | Registered BSAC Snorkel Centre

  • Speaking and Presenting

    BBC | Kendal Mountain Festival

  • Seal Picture



Welcome to Tonic of the Sea

Cornwall BSAC snorkel instructor & registered snorkel centre, speaker and presenter, marine mammal medic rescues with the British Diver Marine Life Rescue (BDMLR) and conservation work with the Mounts Bay Marine Group.

Join me on a Snorkelling Experience!

Join me, a BSAC qualified Snorkel Instructor at low tide for a memorable Cornish snorkelling experience.

What people are saying!

An amazing experience for both of us - Thank you for sharing your knowledge and passion of the sea and for making us feel safe and comfortable in the water. We saw so much we were not expecting to and we can’t wait to go again. Thanks again and hope to see you soon - happy bubbles!!!!
What an awe-inducing experience! My partner and I never knew there were so many magical wonders under a bit of the sea we’d driven past so many times. Our favourites were the bioluminescent limpets! Katie was a fantastic instructor and went above and beyond to make us comfortable on our first UK snorkel trip. She is super friendly and clearly extremely passionate and knowledgeable about the sea and marine wildlife. We can’t wait to go again!
Thank you so much for a wonderful family experience that we will treasure. Katie is so friendly, kind and inclusive as well as passionate and knowledgeable. We had a brilliant morning. Thanks so much, it was perfect! x
Wonderful. My boys and I had a brilliant hour snorkelling with Katie. Her knowledge of the area, the conditions and the sea life we would see was superb made the session something none of us will forget. Thank you Katie.
Such a lovely morning- it was so interesting and so beautiful and right from the start Katie is so warm and welcoming and reassuring. She is absolutely the perfect person to be showing people this gorgeous world under the waves:) xx
Absolutely lovely, magical Snorkel, the seaweed is like swimming through a fantasy world. Katie found us spider crabs, beautiful jellies and lots of wrass. So good to be snorkelling after nearly 4 years of not diving.
I think you already know this, but... I had a brilliant time!! I wouldn't have even got in if it wasn't for you, and now I can say I'd happily go in without tutoring. It's amazing what an hour (well, a bit more thanks to your generosity!) can do for confidence in the water. Thank you.
Thank you Katie for helping us explore the magical sea gardens of Mount’s Bay. The colours! The fish! The way you become so absorbed in the pinky-green gorgeousness it’s impossible to think about anything else. We all felt very safe and now have no fear of what may lurk beneath! It was such a treat to be accompanied by Katie: her enthusiasm, knowledge and sheer delight in the sea are infectious. Highly recommended!
Amazing experience - a new world under the water. If you aren’t sure - give it a go - can’t wait to return - thank you Katie x
Amazing experience! Opened up a whole new world beneath the surface! Katie is extremely knowledgeable and has hugely increased my confidence, changing my entire approach to snorkeling and turning it into such a rewarding experience. Whether you are experienced or a novice I cannot recommend enough. Thanks again Katie.

NEW: I am now offering snorkelling as part of wellbeing retreats

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  • Follow Me @tonicofthesea

    Follow my journey of sea swimming and snorkelling whilst learning about the wonders of our Cornish marine life through my underwater photography, my work as a Marine Mammal Medic for the British Divers Marine Life Rescue and conservation role with the Mounts Bay Marine Group.

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