There is a specific moment most anglers remember from their first liveaboard trip in the Andaman — not the strike, not the release, but the morning of day two, when the boat is anchored over a seamount sixty miles offshore and the only thing on the agenda is fishing. No airport transfers. No checking whether the captain is actually heading where you agreed. The Andaman stretches out in every direction and the day is entirely yours. That quality of access — remote, sustained, unhurried — is what separates a liveaboard from anything a day boat can offer.
What a Liveaboard Trip Actually Means
In the context of Thai saltwater fishing, "liveaboard" means a vessel of thirty-five to fifty-five feet, typically converted from or built alongside the dive-charter market, that takes between four and eight anglers offshore for four, five, or seven nights. The boat is your base. You eat on it, sleep on it, and fish from it or from a smaller tender depending on the target. You move between spots at night, arriving at dawn to work water that day-boats based in Phuket or Khao Lak simply cannot reach in a single run.
The hub for most liveaboard fishing operations on the Andaman is Tap Lamu pier, the same port used by dive liveaboards heading to the Similan and Surin Islands. Proximity to that national park system is precisely the point: the Similans and Surins sit atop an underwater shelf that drops into deep, clear water on the western face, creating the current breaks, pinnacles, and baitfish concentrations that attract everything from sailfish to marlin.
Species You Can Expect
The honest draw of the Andaman liveaboard is variety. No single trip is defined by one species, and that breadth is part of what makes the fishery compelling.
Indo-Pacific sailfish are the glamour target from October through April. Trolling spreads on the surface, or slow-trolled live bait fished on circle hooks around the Similans and Surins, produce consistent shots at fish that average twelve to eighteen kilograms in Thai waters. Double-headers are not uncommon during the January-to-March peak.
Giant trevally — GTs — are present year-round around the limestone outcrops and rock walls of Phang Nga and the national park islands. Liveaboards that specifically target GTs will carry heavy spinning gear and popping plugs and work the corners and exposed points on the morning tide. These fish are found in the same water, so a liveaboard itinerary built around sailfish will almost always include GT sessions at dawn.
Dogtooth tuna are the deep-jigging prize. They school over pinnacles and steep reef edges at depths of sixty to a hundred metres, and a liveaboard that plans to jig seriously will stage over these marks at first light. Dogtooth between fifteen and thirty kilograms are realistic; larger fish in the forty-plus range exist and are taken every season.
Amberjack, large grouper, and snapper fill out the jigging sessions. Spanish mackerel, wahoo, and tuna will hit trolling lures and live bait on transit legs between spots. Some itineraries, particularly those running further north toward the Burma Banks when water conditions allow, will encounter black marlin as a genuine bycatch possibility — though marlin remain targets of opportunity rather than reliable quarry.
Itinerary Structure: What Four to Seven Days Looks Like
A typical four-night itinerary out of Tap Lamu runs roughly as follows: departure in the afternoon, overnight transit to the outer Similans, three full days of fishing rotating between trolling runs, jigging marks, and popping sessions on the rocks, then a return overnight transit arriving on the morning of day five. Seven-night trips extend the range — running past the Surins toward the Burma Banks border zone — and allow more time to fish specific conditions rather than work to a tight schedule.
The structure of each day on the water usually looks like this: early morning popping or live-bait fishing while the light is low and GTs and sailfish are most active, a mid-morning transition to jigging as the sun rises and surface activity decreases, a break through midday, and then an afternoon trolling run covering water between marks. Operators who know what they're doing build flexibility into this structure; the best captains will abandon the plan and chase whatever condition is in front of them.
What's Onboard
Liveaboard fishing vessels on the Andaman vary considerably in comfort level, and price tracks closely with fit-out. At the budget end — trips running roughly $200–$280 USD per person per night — expect functional but basic: shared bunk cabins, a simple galley producing Thai food, deck space for rods and tackle, and an experienced captain with local knowledge. Mid-range operations at $300–$450 per person per night typically offer ensuite or semi-private cabins, better provisioning (including western breakfast options), a full complement of shared boat rods, and dedicated deckhands who will rig, bait, and assist throughout the day. Premium operations — some operating vessels purpose-built for sport fishing with fighting chairs, outriggers, and tuna towers — approach $500–$700 per person per night and cater to groups chartering the full vessel.
Most operators include all meals, drinking water, and basic tackle in the daily rate. Fuel is typically included. What varies is the quality of shared tackle available, whether live-bait facilities (a recirculating tank or bait cage) are maintained, and the depth of the captain's knowledge of specific marks.
How It Differs from Day Trips
Day boats from Phuket, Ao Chalong, and Khao Lak run excellent trips — particularly for sailfish during the season — but they are constrained by geography. A day trip from Ao Chalong to the Similan Islands is a two-and-a-half to three-hour run each way. That leaves a working window of perhaps five or six hours on the water before the captain needs to head home. In productive conditions, that's enough. In slow conditions, you've used your day of fishing to travel.
A liveaboard eliminates that calculus. You are already at the mark when the tide turns. You can follow bait schools that move overnight. You can fish the Burma Banks on day four and be back at a Similan pinnacle on day five. The liveaboard is not just more comfortable — it accesses a genuinely different category of fishing.
The Operator Landscape
The Andaman liveaboard fishing market is smaller than the dive-liveaboard market it runs alongside, and the best operators tend to be known quantities among serious anglers. Look for captains who have fished these waters commercially for at least five to ten years, who maintain live-bait systems, who can produce verifiable catch records from recent seasons, and who will be transparent about what the current season has been producing.
Shared-charter trips — where you book berths alongside other anglers you haven't met — are common and work well when the group is aligned on targets and technique. Private charters give you more control over the itinerary and are worth the premium for groups with specific goals, such as a dedicated GT popping trip or a jigging-focused itinerary.
The best source of operator vetting is the network of other anglers who have fished the Andaman recently. Online fishing forums and the Thai fishing community on social media surface both the standout operators and the cautionary tales.
Conservation and Release
The liveaboard community on the Andaman has moved, broadly, toward catch-and-release on sailfish and on species like dogtooth tuna where the population dynamics are less well understood. Most reputable operators now fish circle hooks for sailfish, maintain a release-first culture on deck, and photograph fish before reviving and releasing. Anglers who want to take a trophy fish for the wall are increasingly accommodated through replica mounts rather than kill-and-mount — a good operator will have contacts for this service.
GTs are almost universally released. Grouper and snapper retained for the galley is common practice and considered acceptable in moderate quantities.
Where to Go from Here
A liveaboard trip is the most complete version of Andaman sport-fishing, but understanding the component fisheries makes the planning more productive. Read the dedicated guides to the sailfish season in the Andaman, GT popping around the Similans, and deep-water jigging on the Andaman before booking. The Similan Islands fishing guide covers the park geography and permit situation that any liveaboard operator will need to navigate. And if you're working out timing, the best time to fish in Thailand calendar gives you the full seasonal picture beyond just the saltwater fishery.
