Diving the Similans, Koh Tachai and Richelieu Rock this season there has been a very noticeable increase in productivity on many Simillan dive sites. Richelieu has its resident über mob of juvenile Giant trevallies and Longnose emperors. Koh Tachai, when the current pumps so do the Bluefin trevally and Rainbow runners.
All around the Similans there are more dog tooth tuna, snapper and other types of predatory fish. There are a few possible reasons why we are seeing more bigger fish on our dive sites. There is also a number of contenders in the running for top predator of 2018.