On a month trip travelling in Columbia we did a 10 dive package with the Poseidon Dive Center: www.poseidondivecenter.com in Taganga. Max, the owner & Course Director there & his staff were wonderful. We gave up counting octopus, eels of all kinds, trunk fish, cowfish...& I'm sure I'm missing something. Sometimes there was current too, which is wonderful. There's lots of dive centres in Taganga but Poseidon's boats have a top for shade & there is always cold water on the boat & a surface interval on the beach in Tayrona park with lunch. Want to take a course? There's bi-lingual staff, dormitories & a pool too!