Ringo
Contributor
Here's another link about the Orca and Bryde whales spotted up there recently.
http://www.thaivisa.com/forum/index.php?showtopic=114254
http://www.thaivisa.com/forum/index.php?showtopic=114254
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Agree with that for the start of the season. Later on the visibility will not be that good, mainly because of the plankton in the water. But the plankton has of course also advantages with regards to marine sightings ...The common visibility in Similans and Richelieu is 25 to 40 meters.