What is the difference between pompano dolphinfish and mahi-mahi?

Both belong to the genus Coryphaena, but they are separate species. Mahi-mahi (C. hippurus) grows much larger — to 40 kg and beyond — and males develop a highly pronounced squared-off forehead. Pompano dolphinfish (C. equiselis) are compact, rarely exceeding 75 cm, with a more rounded head profile in both sexes and a noticeably deeper, shorter body relative to length.

Are pompano dolphinfish caught around Thai FADs?

Yes. Pompano dolphinfish are strongly associated with floating objects — FADs, drifting logs, buoys, and weed lines — just like mahi-mahi. In Thailand they are most commonly encountered as secondary catch alongside mahi-mahi on offshore FAD trips.

How do I identify a pompano dolphinfish in the hand?

Look at the body depth and head shape. Pompano dolphinfish have a noticeably deeper body relative to their length than mahi-mahi of similar size. The forehead profile is rounded and similar between males and females — neither sex develops the steep, blunt forehead of a large male mahi-mahi. The dorsal fin still runs the full length of the body.

What tackle works for pompano dolphinfish?

PE1–PE2 light spinning tackle is ideal. A 2500–3000 size reel with 10–15 lb braid and a 15–20 lb fluorocarbon leader, matched with a 6–7 ft medium rod, gives you the best feel for a fish that maxes out around 3.5 kg.

Are pompano dolphinfish good eating?

Yes. The flesh is excellent — white, firm, and mild. The small size produces limited fillets, but the quality is identical to mahi-mahi.

Can I catch pompano dolphinfish on fly?

Yes. Their association with floating objects makes them accessible to fly anglers who can position a skiff alongside a FAD. Small baitfish patterns on a 7–8 weight outfit work well.

Are pompano dolphinfish the same as pompano (the species sold in fish markets)?

No. 'Pompano' in fish markets typically refers to various species of the family Carangidae — particularly permit or Florida pompano. Pompano dolphinfish is simply the common name for Coryphaena equiselis and is unrelated to true pompano.

Pompano Dolphinfish in Thailand: The Smaller FAD Species

When anglers talk about dolphinfish in Thailand, they almost always mean mahi-mahi — the spectacular, fast-growing Coryphaena hippurus that inhabits the same offshore FAD zones and weed lines as wahoo, yellowfin tuna, and sailfish. The mahi-mahi page on this site covers that species in full detail, including Thai locations, seasonality, and the offshore FAD-fishing calendar.

This page is about the other one.

Coryphaena equiselis — the pompano dolphinfish — shares the genus, shares many of the same habitats, and shares the same dazzling live colouration. But it is a distinct species, substantially smaller, and subtly but reliably different in both appearance and behaviour. In Thai waters it is almost always encountered as part of a mixed catch alongside mahi-mahi around FADs and floating structure, and it is regularly misidentified as a juvenile mahi-mahi and returned without a second look.

Understanding what you are actually holding is part of fishing attentively. And on the right tackle, a pompano dolphinfish is its own modest reward.

A Tale of Two Coryphaena

The genus Coryphaena contains exactly two species worldwide: C. hippurus (mahi-mahi, common dolphinfish, dorado) and C. equiselis (pompano dolphinfish). They are close relatives with overlapping global distributions across tropical and subtropical oceanic waters, and they occupy near-identical ecological niches — surface-oriented, fast-growing, pelagic predators associated with floating structure and current edges.

The size difference is the most practically important distinction. Mahi-mahi grow to over 40 kg in exceptional circumstances, with common Thai specimens running 5–15 kg and fish to 20 kg occurring regularly on good offshore grounds. Pompano dolphinfish max out at around 3.6 kg and 75 cm in the IGFA record books; most individuals encountered in Thai waters are 30–55 cm and under 2 kg.

The IGFA lists both species separately. The all-tackle pompano dolphinfish record is 3.6 kg, set in Spain in 2019. Mahi-mahi records extend far beyond this — the all-tackle mahi world record is 39.46 kg. Any Thai dolphinfish catch approaching or exceeding the pompano record would be worth careful documentation.

Identification: How to Tell Them Apart

At small sizes — say, a 30–40 cm fish — distinguishing the two species requires attention. Both have the characteristic long dorsal fin running from near the head to the tail, brilliant live colouration of gold-green-blue with scattered spots, and a deeply forked tail.

The key markers for pompano dolphinfish:

Body depth. The pompano dolphinfish has a noticeably deeper body relative to its length. Placed side by side with a mahi-mahi of similar length, the pompano dolphinfish looks stockier and more compressed.

Head profile. Both male and female pompano dolphinfish have a rounded head with a moderate forehead slope. Large male mahi-mahi develop the famously steep, almost vertical forehead profile (the source of the Hawaiian name, "mahi-mahi" meaning "strong-strong"). Even female mahi-mahi show a more pronounced head slope than pompano dolphinfish of any sex.

Dorsal fin length. The dorsal fin of the pompano dolphinfish, while long, has a proportionally shorter base length relative to body length compared to mahi-mahi. This is a subtle character but consistent.

Squamation. Pompano dolphinfish have smaller, more numerous scales compared to mahi-mahi — a character that requires close inspection but is definitive in specimens examined carefully.

In practice, head shape combined with body depth will resolve most identifications in the field.

A pompano dolphinfish caught alongside a large male mahi-mahi looks like a completely different fish. But next to a juvenile or small female mahi-mahi, the differences require deliberate attention.

Where Pompano Dolphinfish Occur in Thailand

The distribution mirrors that of mahi-mahi almost exactly, because both species use the same habitat: the open pelagic zone, anchored to floating structure where concentrations of small baitfish create reliable feeding opportunities.

FADs (Fish Aggregating Devices) are the primary focus. Thailand's offshore waters — both the Andaman and the Gulf — contain a network of anchored FADs maintained by fishing communities and, increasingly, by charter operators as a service to their clients. FADs aggregate everything from small baitfish to large pelagics, and both mahi-mahi and pompano dolphinfish are reliably present at well-maintained FADs throughout much of the year.

In the Andaman, the offshore FADs west of Phuket, Khao Lak, and the Similan Islands hold the highest densities of both species from approximately December through April. The Gulf's FAD network, concentrated in the waters around Chumphon, Koh Samui, and south toward the Malay Peninsula, is accessible year-round.

Drifting structure is the second habitat type: logs, patches of floating weed (particularly Sargassum), discarded fishing gear, and any other flotsam in open water. Current edges where different water masses meet — visible as colour changes or foam lines on the surface — concentrate both species. These opportunities are unpredictable but can produce impressive numbers of fish on trolling or spinning trips.

Season

Pompano dolphinfish, like mahi-mahi, can be encountered year-round in Thai waters given access to FADs. The most reliable window in the Andaman corresponds to the northeast monsoon season (November–April), when settled conditions make offshore runs to FADs practical and both species are most active in the clearer, cooler post-monsoon water.

In the Gulf, the FAD-fishing calendar is more forgiving, with consistent access possible from October through May and tolerable conditions through much of the remaining period. The Gulf's dolphinfish fishing tends to be less dramatic than the Andaman's in terms of fish size, but the accessibility compensates.

Peak feeding activity for both Coryphaena species correlates with the presence of flying fish schools — a prey item that both species pursue actively, often in mixed-species groups that combine mahi-mahi, pompano dolphinfish, and wahoo in the same surface boil.

Technique

Because pompano dolphinfish max out well under 4 kg, the most satisfying approach is light to ultra-light tackle. The standard trolling spread run on mahi-mahi trips — medium-weight gear with skirted lures at 7–8 knots — will certainly catch pompano dolphinfish, but they will feel trivial on 30 lb class outfits.

Light spinning is the recommended approach for anglers who know they are working a FAD with a mixed mahi-pompano population. Small metal jigs (10–30 g), soft plastic shads, and surface minnows in the 60–90 mm range all work well. The retrieve should be fast — pompano dolphinfish are aggressive, high-metabolism predators that respond to speed. A fast, erratic retrieve with occasional pauses produces more strikes than a slow or steady retrieve.

Casting poppers around FADs, particularly at dawn when fish are active at the surface, is productive and exciting. Small cup-face poppers (15–25 g) worked quickly produce explosive surface strikes. Because the fish are small and the hooks are in open water away from structure, you can afford to use slightly lighter tackle than you would near reef.

Natural bait — live small fish (hardyheads, small sardinella), squid strips, or fresh-dead small fish fished under a float — is extremely effective and a useful approach when lures are being ignored. Pompano dolphinfish are not selective feeders; if the bait is fresh and presented in the right place, they will eat it.

When fishing a FAD with both species present, let a hooked pompano dolphinfish stay in the water near the boat rather than landing it immediately. Both species are stimulated into competitive feeding by the distress signals of a hooked fish. This technique — sometimes called "keeping one in the water" — can trigger a feeding frenzy that lasts several minutes.

Tackle

PE1–PE2 spinning gear is the sweet spot:

Rod: 6–7 ft medium or medium-light spinning, rated 10–25 g lure weight
Reel: 2500–3000 size, good drag quality
Main line: PE1–PE2 braid (8–15 lb)
Leader: 15–20 lb fluorocarbon, 1.5–2 m

On this gear, a pompano dolphinfish of 1.5–2 kg produces a genuine sporting fight — fast, direction-changing, with the same aerial leaping tendency as the larger mahi-mahi. On 30 lb trolling tackle, the same fish is unremarkable.

For trolling programs where the primary targets are mahi-mahi or wahoo and pompano dolphinfish are incidental, the existing medium-weight setup is fine. Just know what you have before you release it.

The C. hippurus vs. C. equiselis Distinction: Why It Matters

Practically speaking, most Thai offshore anglers will continue to treat any small dolphinfish as a juvenile mahi-mahi. This is a reasonable shorthand, and for most fishing purposes the distinction is academic. But the species boundary matters in a few specific contexts:

IGFA records. The two species have separate record categories. A carefully documented pompano dolphinfish on light line-class gear could legitimately be a record fish in some categories, since the all-tackle record is only 3.6 kg.

Biological accuracy. Pompano dolphinfish reach sexual maturity at smaller sizes and have a slightly different growth trajectory than mahi-mahi. Understanding what you are catching matters for any serious conservation engagement with the species.

Scientific data. If you participate in any citizen-science recording programs for pelagic fish in Thai waters, correctly identifying the two species adds meaningful data.

For everything else about dolphinfish — the offshore FAD calendar, the full mahi-mahi natural history, Thai locations, tackle classes for larger fish, and conservation context — the mahi-mahi Thailand article covers the common dolphinfish in detail. The two pages are complementary rather than duplicative.

Conservation

Pompano dolphinfish are not assessed separately from mahi-mahi in most conservation frameworks and are not listed as threatened. They share mahi-mahi's rapid growth and early sexual maturity, making them relatively resilient to fishing pressure compared to slower-growing pelagic species.

The offshore FAD network in Thailand is a mixed-conservation topic: FADs concentrate fish effectively but can attract fishing effort that reduces populations around individual devices. Sustainable FAD management — limiting catch at any single FAD and distributing effort across multiple locations — is the approach recommended by Thai marine fishery managers.

For the complete mahi-mahi picture in Thai waters, mahi-mahi Thailand is the primary reference. The wahoo Thailand article covers the frequent companion species on FAD trips. For the offshore operational context — liveaboard programs, FAD locations, and the Andaman offshore calendar — liveaboard fishing Thailand and Gulf of Thailand fishing guide are the relevant starting points.

Yellowfin tuna Thailand and sailfish complete the picture of what shares these offshore waters with both dolphinfish species on a productive Andaman or Gulf day.