Body Glove Hawaii Cruises
51 foot tour boat offering whale watching plus snorkel and dolphin sails, departing from Kailua Pier. Contact and pricing information, plus pictures of the trips.
Captain Zodiac Raft Adventures
Zodiac raft trips from Honokohau Harbor to Kealakekua Bay for snorkeling. Site states these types of boats are the least likely to cause sea-sickness.
Sea Quest Rafting and Snorkeling Adventures
Offer snorkel tours: pictures, itinerary, and contact details.