Pedasi has been called the "Tuna Coast" and fisherman from all over the world come to fish these Panamanian waters! Amberjack, grouper, pacific sailfish, cubera snapper and roosterfish are often found year round. Where as bigeye tuna, yellowfin tuna, bluefin trevally, dolphin and dorado (also commonly known as mahi mahi) are found most in the peak season of winter and spring. Peak season for wahoo fishing is in the month of October, though wahoo can often be fished as early as May. Marlin and swordfish can also be found at times.
http://www.panafishing.com/index.html
https://www.facebook.com/Playavenaofishing/
http://www.xn--islacaasmarina-vnb.com/index.php?page=fishing
http://www.casalajagua.com/activities/
Contact one of the tour companies above if you are interested in a chartered fishing trip and learning more about fishing conditions. You can also hire a captain from Playa Arenal for a fair price which can include all equipment.