Posts by dumpsterDiver and brnt999 illustrate one of my previous points. It does depend on where you are, what you are doing, and how many of you are around. Touching a turtle off a charter boat in the northern Gulf of Mexico in February and a hundred divers doing the same regularly in Cozumel are very different situations. Turtles do, as pointed out, get killed by boat motors, etc. We can prevent this only by not using those boats. On the other hand, as I first said, I would never play catch with a puffed up blowfish. The latter, though way less damaging to the animal, is just cruel. I have, on occasion, in Nova Scotia, and other places with very sparse dive populations, touched a fish lying on the bottom just to see how it swims --- only if it was the rare occasion that I did not recognize the species and it did not appear harmful (if it's a flounder, I poke spear and eat it). If 100 people do this in Roatan each day you've got a problem.