Southeast Asia Backpacking Nov.-Dec. 2018

Thailand: scuba diving in the Andaman Sea—Part 3

3 December Andaman Sea
Of all the trips offered by Similan Diving Safaris, the five-day program is my favorite. And it happened another one would be leaving this evening, so I signed up! All my gear had already been sorted out, so I had most of the day free. Many of the best photos of the past five days went up on my Facebook page and are now on this website as well. And I got a chance to meet some of my fellow divers on the upcoming trip. In the late afternoon on a pleasant sunny day, we piled into a pair of vans for the ride north to the port near Khuraburi, then boarded the Similan Explorer. As before, we had a welcome talk and introductions from crew, then a tasty Thai dinner. And, of course, firecrackers chased off any bad spirits as we left port and turned toward the Andaman Sea.


Fishing boats at rest in Khuraburi’s port


Soon most of these boats will go out to sea.


The sun sets over the Andaman Sea as we get ready to depart.


Firecrackers wrapped around the stick go off in a fury of smoke and noise for good luck!

4 December Andaman Sea
When the sun rose we had already arrived at our first dive site, Koh Chi, located off the northernmost of the Surin Islands and only three nautical miles from the Myanmar border farther north. The early morning dive went down to 23 meters—averaging 16 meters—and stayed 56 minutes. We saw a lot of life including small critters such as the very well camouflaged orangutan crab, nudibranches, varicose wart slug, pipefish, and the colorful yet shy peacock mantis shrimp. Giant clams lay about, and I remembered reading horror stories as a kid about skin divers getting trapped by clams and drowning. I may have seen such an incident in the TV series “Sea Hunt” as well, but in those days we didn’t have the internet to fact-check things. It turns out that clams close their shells sufficiently slowly that a diver would not be trapped. Lots of the usual fish swam about including Malabar groupers, oriental sweetlips, bannerfish, parrotfish, and lionfish. Playful clownfish stuck close to their home deep in anemone tendrils. And giant moray eels waited patiently in their holes.
 
The late morning dive went down at Torinla North, where the fish again put on a fine show—tiny ones in the hard corals and larger species out in the open water. We were lucky to find a ghost pipefish near the bottom and a tiny seahorse, still gripping a piece of vegetation, near the surface. Big waves had sprung up, making getting back on the boat an extra challenge. Once aboard, we rode to a protected bay for lunch.
 
Next we dove at Ao Sutep off South Surin Island, and found a very pretty translucent orange nudibranch, Thecacera pacifica, commonly called a ‘Pikachu nudibranch’ due to its resemblance to the Pokémon character. Pineapple and marbled sea cucumbers crept imperceptibly across the seafloor, but they are so ugly that us divers pay little attention to them! A pair of colorful painted spiny lobsters (Panulirus versicolor) tried to hide under a ledge. The well-named harp corals do well here along with many kinds of hard corals. We saw bluespotted stingrays (Neotrygon kuhlii), brown marbled grouper, and one of my favorites, the immaculately ‘painted’ powder blue surgeonfish or powderblue tang (Acanthurus leucosternon).
 
At night we headed into the water at Coconut Bay near South Surin Island and saw lots lobsters, giant red crabs, smaller crabs, large and small cuttlefish, sleeping parrotfish in their mucus cocoon, and a few fish out and about.




The dawn’s early light glows on the Surin Islands.


Krys makes a selfie with a feather star and starfish.


The crown-of-thorns starfish
(Acanthaster planci) has pretty colors despite its destructiveness and poisonous nature.


Fish can be curious! This looks like a painted sweetlips 
(Diagramma pictum).


Porcelain anemone crabs
(Neopetrolisthes maculatus) use their disproportionally large
claws for protection and territorial fights with other crabs rather than for catching prey.


The Indian Ocean oriental sweetlips
(Plectorhinchus vittatus) is a species of grunt native
to the Indian Ocean and the western Pacific Ocean. We often saw them in small schools.


Giant moray eel with a cleaner shrimp on its chin

 
Surin Islands

5 December Andaman Sea
We hung around South Surin Island for a morning dive at Torinla Original where we found a pair of tough-to-spot seagrass ghost pipefish that does look very much like a piece of drifting seagrass. More common creatures included Jenkin’s ray, Malabar grouper, Napoleonfish, triggerfish, oriental sweetlips, and angelfish.
 
During breakfast we motored to Richelieu Rock, my favorite dive site of the region, and on the way we saw dolphins and a manta ray, which got everyone excited. Under the water, visibility had greatly improved since my visit several days ago. We went deep to 28.7 meters to take in the great range of life here including the vibrantly colored soft corals and innumerable numbers of fish. A reef octopus, hounded by fish, swam by. The ‘gang’ of trevally, napoleon wrasse, and rainbow runner swept through the water intently focused on finding prey.
 
In the early afternoon we made another deep dive at Richelieu Rock, finding a pair of very small and pretty harlequin shrimp (Hymenocera picta) with a cream-colored body covered in polka-dot-like spots. And we met up with a pair of cuttlefish near the end of the dive.
 
The water seemed murkier for the sunset dive. Great streams of silvery fish circled around, attracting the attention of trevally and some mackerel. Near dive’s end we found a cuttlefish couple.


Seagrass ghost pipefish (Solenostomus cyanopterus) at Torinla Original


Angelfish add lots of color to the undersea world! This is an emperor angelfish
(Pomacanthus imperator).


I like watching jellyfish slowly pulsate on their seemingly endless voyages.


Squirrelfish come in about 70 species of large-eyed tropical reef fish.


A Christmas tree for the underwater world?


Luca says hello to one of his cuttlefish friends.


I’m admiring the colorful soft corals of Richelieu Rock and the shimmering school of glass fish.

6 December Andaman Sea
Overnight our captain took us to Koh Tachai, but the current was so strong at our intended dive site the next morning, that we chose to go down at the more sheltered Tachai Reef. Here in current, we saw great barracuda and Spanish mackerel, Kuhl’s ray, giant moray, and in the coral crevices, banded boxer shrimp.
 
In late morning we braved the current at the preferred dive site, Koh Tachai Plateau, and saw massive tunas as well as trevally, gray and pickhandle barracudas, and lots of reef fish. We hung onto the flat-topped underwater plateau, which Luca likens to a panatone (the Italian Christmas bread), in strong current before surfacing.
 
While we munched on lunch, the boat headed for Koh Bon, the limestone island, where we had our most exciting dive of the trip thanks to a manta ray, which joined us for the entire time. It seemed curious about us divers and repeated circled back. Occasionally it would abruptly turn upward to near the surface before resuming its looping path. They are filter feeders and eat large quantities of zooplankton, which they gather with their open mouths as they swim, aided by a pair of horn-shaped cephalic fins located on either side of their mouths. Also, they must swim continuously to keep oxygenated water passing over their gills. More about the life of this great animal is at https://en.wikipedia.org/wiki/Manta_ray. A pair of remora had attached themselves above the mouth, appearing a bit like headlights. A cobia fish tagged along behind.
 
On the sunset dive I found a rare Maldives sponge snail (Coriocella hibyae) that doesn’t look like a sponge at all. The dark mantle covers several protuberances that could easily be mistaken for a sponge or sea slug, but when I got close to the creature I could see that it had a snail’s foot and moved along at a snail’s pace. They’re native to the Maldives, yet also appear at just a couple places here in Thailand. Near dive’s end, we swam with a friendly school of batfish. A thunderstorm lit up the sky after the dive.


Lionfish don't need camouflage because their venomous spines deter just about any predator. (Tachai Reef)


Barracuda are built for speed! (Koh Tachai Plateau)


A starfish takes center place.


This friendly manta ray swam among us for the entire dive!


The manta ray seems to like divers.


A pair of remora go along for the ride.


Longfin batfish
(Platax teira) are very mild mannered. (Koh Bon).


Koh Bon

On to scuba diving in Thailand’s Andaman Sea Part 4

Back to Beginning of Southeast Asia Backpacking Nov.-Dec. 2018