Turtles Everywhere

[Continuing my diving adventures in February 2008 off Maui with Mike Severns Diving.]

In about forty-five feet of water, a little murky because of its sandy, rubble-strewn bottom, I rounded a compact-car-sized boulder and found myself hovering just above a green sea turtle. About three feet long from slightly hooked beak to tip of tail, the turtle was resting on the bottom, eyes open but apparently asleep. I dropped down to take a couple of photos, then swept around the boulder and found myself in turtle central!

Four green sea turtles even bigger than the one I’d just left rested on the floor to my right, one half-in a crevice and the other three looking like they were trying to squeeze in behind him. Straight ahead a slightly smaller turtle was paddling its patient and graceful way to the surface for a breath of air. To the left three more turtles lay on various humps of coral, a little more spaced out than the ones trying to crowd into the crevice.

Dan, the dive master who had told us on the surface that he always saw at least one turtle here, hung in midwater, grinning around his regulator as he watched us try to figure out which turtle to look at – and photograph – first! As he had promised, the turtles were quite used to divers, and were not disturbed as we eased in for a closer look. Their eyes were open and they followed my clumsy progress as I maneuvered all around them, popping off photos and simply admiring them.

Green sea turtles are the most commonly seen sea turtle species around Maui. Unlike land turtles, sea turtles cannot retract their soft bodyparts – head, four fins, and tail – into their shells for protection. Their front fins are quite long and thick, well-shaped for paddling, and I am always amazed at the grace with which they soar through the water. They can easily outdistance a diver or snorkeler if they are feeling harassed. They’ve been federally protected for three decades now, and like the humpbacks their numbers have made a gradual recovery and are at a healthy 10,000 or so individuals.

Federal protection means it’s illegal to harass a green sea turtle, and for practical purposes, harassment means doing anything that makes them change the behavior they are exhibiting when you encounter them. So we were careful not to touch them or get close enough to inadvertently bump into them, and tried to respect their personal space bubbles as we watched them rest. I tried not to get my camera too close, so that the flash wouldn’t bother their eyes, but I did want to get facial portraits of as many as I could, since I have learned that the markings on the cheek are unique to each turtle and can act as an identifying “fingerprint.”

Dan had mentioned that these turtles seem to have preferred resting spots, and that they will sometimes jealously compete for a prime piece of real estate. If one turtle arrives to find its favorite nap zone already occupied, it may repeatedly bump the snoozer, trying to dislodge it and claim the space for itself. If that fails, it may just lie down right on top of the first turtle! Dan claims he has found turtles stacked three high on some really primo spots.

The turtles on the left had space between them and seemed to be resting happily in their spots, but the ones on the right were definitely in competition for the best position, a flat spot where the lucky possessor could wedge its head and most of its body beneath an overhanging ledge. As I watched, two turtles bumped their shells against that of the guy who’d gotten there first, both trying to muscle in and pry their competition out of its hidey-hole. One of the interlopers gave up fairly quickly, but the other one kept up the harassment, eventually nipping at the half-hidden turtle’s exposed fins and tail with some vicious-looking snaps of its curved beak.

Green sea turtles can go for 20 to 30 minutes on one lungful of air, and only one departed for the surface during the ten or so minutes we were with them. Sometimes they rise and bob along on the surface for a little while, but from the surface you'll often get just a glimpse of a softball-sized head popping up, taking a quick gulp of air, and disappearing again. They eat primarily algae, scraping it off the rocks with their slightly hooked beaks or ripping off big chunks of limu, a seaweed growing in the shallow sandy patches.

They are quite single-minded when eating, and don’t let divers, competing turtles, or anything else distract them from their determined grazing. On an earlier encounter with a single turtle at another dive site, a fellow diver and I landed on the sandy bottom, one on either side, hunkering down so that we were eye to eye with the turtle, who was maybe three feet long. It looked at each of us and went straight back to hooking and gulping strands of limu like it couldn’t care less.