There is great fishing in all three ports. Just Google it and you will find tons of charter boats and pangas available. Not many folks know this, but the marlin and tuna grounds are only about a 45 minute run from Punta Mita north of Puerto Vallarta.
We did those ports in the spring. The canopy tour was a blast. There are two in puerto Vallarta, Vallarta Adventures and another one I don't remember the name but an internet search should give you the info.
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