Snorkelers, divers and whale lovers can check Okinawa off their bucket list with this special from Marine House Seasir.

Pre-book to save up to 20% on aquatic excursions around the Kerama Islands, where excellent visibility and colorful underwater life greet guests.

Catering to all abilities, discounted excursions include:

• Whale watching ... $41 per person (JPY 3,840)
• Snorkeling ... $68 per person (JPY 6,360), including equipment and a short lesson
• Diving excursion ... $134 per person (JPY 12,560); certified divers can take a trip that visits different sites and includes two dives

All excursions include roundtrip hotel transfers (from the Naha city area), a Japanese lunch, towels and insurance. Double-deck diving boats have a hot shower, fresh water and a toilet onboard. The dive center is a 20-minute drive from Naha Airport.

The 20% discount is valid on most dates through Aug. 9. The following peak season dates have also been discounted by 10%: April 27 - May 6; June 15, 22, 29; July 13-15, 20, 27; Aug. 3.

Note: Whales and dolphins can be seen in the waters around Okinawa through March. If guests don't see any whales or dolphins on the trip, a full refund will be given.