Yes, most hotel reservations are refundable if you cancel before the hotel's cancellation deadline, which is often 24 or 48 hours before your arrival date. If your reservation is non-refundable, you may still be able to cancel and receive a refund within 24 hours of your booking. Plug in your dates, click on "Search", then you can filter by "fully refundable" to get top deals close to Oceanarium.