These guys are all over the jetty - inside the river mouth and outside in the ocean.  The ocean side is certainly cleaner.  Also, the other day a local was rolling 2.5 ft. diameter rocks off the jetty into the water while I was diving.  I hadn't caught any fish at that point, but I did catch some in there last April.  I got the message he was sending with the boulder.  I'll stick to the ocean side from here on.  The time before when I did catch some, two of the local fellas were trying to get me to pay for catching their fish.  The disgruntled ones are the minority and almost everyone enjoys watching from the rocks.  Still, today I parked on the other side of the river.  I don't want to wear out my welcome.  I've given away 1/3 or 1/2 of my catch each time.  I enjoy giving some away, but it also helps to keep folks happy.

The one pictured is average size.  They taste good; a light, sweet meat.  I've gotten two names for the thing one of which I've forgotten.  Even if I knew, English letters don't suffice for the pronunciation.  Malayalam has 4 "k"s plus a distinct double ("kk") for some of those, 12 or more letters/sounds between between "t" and "d", a few sounds for which there is no close match, and the list goes one. 

Yummy, yummy.