She added: "My hand is ok again and has a scar now in shark teeth shape that will forever remind me of that beautiful day in the Exumas.
"I cannot tell you the second of shock I felt when I saw this shark opening his mouth grabbing my hand.
"People always tell you when a shark attacks you should stay calm.
"Let me tell you in reality when it happens there is nothing like staying calm, you completely freak out."
The blogger said "I've always had an endless passion for travelling and a weakness for exotic beaches, exploring other cultures and stylish hideaways."
With 347,000 followers on Instagram, 106,000 likes on Facebook and training at one of the world's leading hotel schools - Mareen is an accommodation expert.