There are several companies that offer manatee and dolphin cruises over on the banana river departing from Kelly Park - about a 45-60 minute drive out towards KSC. They are small companies often with a couple of boats each but we have been several times and it is a lot more personal and sedate than the 40mph Sea Screamer ... these guys cut the engine and drift and the manatees come right up close ... and the dolphins come in via Canaveral lock for a play too.