From the warm Gulf of Mexico, through Florida and up into the Northeast, these creatures are known as dolphinfish, or simply dolphin. However, their presence extends far beyond these areas. In fact, they can be found in temperate waters all over the world. The striking images and illustrations of them leaping out of the water in vivid colors have captivated magazine readers for years. They are a common catch on offshore expeditions, often caught while targeting tuna, marlin, and wahoo. Despite this association with offshore fishing, classifying mahi mahi as solely an “offshore” fish is not entirely accurate.
In various regions across the globe, including here in the U.S., it is not uncommon to spot these shimmering fast-swimming creatures near land. However, many recreational fishermen looking for shallow water catches such as flounder, seabass, striped bass, and snook may not realize that just a short trip further out can lead to a delicious meal of grilled mahi. The best part is, going after these inshore dolphins provides an exhilarating light-tackle sport experience – unless you happen to hook onto a large one that requires heavier gear typically used for tuna or marlin on a chartered trip. Although learning how to catch mahi mahi is simple enough, it’s important to know why they should be a target before gearing up.
As a highly populated species in the ocean, mahi-mahi are commonly featured as the “catch of the day” and can be easily purchased in bulk at stores such as Costco. This fish is known for its sustainable harvesting methods, which can be attributed to their fast-paced life cycle.
Dolphins have a fast growth rate and can spawn multiple times per year as adults. In fact, the 1976 world-record catch weighed 87 pounds and was believed to be only five years old. If they manage to avoid being eaten by predators early on, most mahi have a lifespan of three to four years. To achieve their rapid growth, young fish need to consume significant amounts of food. This makes them one of the least picky and most opportunistic fish in the ocean, much to the delight of anglers of all ages and skill levels.
What are the water conditions for Mahi Mahi?
The abundance of mahi near shore tends to vary seasonally in most regions. In the Northeast, where I reside, the optimal time for finding them within a 30-mile range is typically from late July to early October. Monitoring water temperature is crucial in this pursuit and free resources such as NOAA’s sea surface temperature charts can greatly aid in one’s success. The ideal temperature range to look out for is between 70 and 80 degrees Fahrenheit; while there is a possibility of catching mahi in colder waters (as low as 65 degrees), the chances are much higher when the temperature reaches approximately 73 degrees or above.
Another important aspect to keep an eye on is the color of the sea’s surface. This can easily be achieved by utilizing the available free data from NOAA, which specifically measures levels of chlorophyll. While yellowfin tuna and marlin tend to favor exceptionally clean, pristine blue waters, dolphin are not as particular. While murky water may not be ideal, as long as it is transparent (whether in a vibrant blue hue or the more typical green found near shore), you can expect to have some successful fishing.
In the summertime along northern coastlines, the Gulf Stream may bring warm and clear water towards the shore. Those in tropical areas have the chance to encounter dolphins throughout the year. Regardless of location, it is crucial to locate fish when aiming for a successful mahi mahi catch, provided that the weather and water conditions are suitable.
Where to look for Mahi Inshore
Years ago, I landed a small mahi off the end of a jetty in Central New Jersey. It was a rare occurrence, but that summer, the warm offshore water extended all the way to shore. While I typically catch them within 3-15 miles from the coast, these fish are still considered pelagic and roamers of the open ocean. However, it is possible to come across them in the same areas as other bottom-dwelling fish. Mahi are often found near humps, depressions, reefs, and wrecks, making trolling with light tackle an effective method for covering more ground. Of course, if you prefer casting like I do, targeting surface structures is the surest way to locate mahi.
Surface structures that offer shade and provide a refuge for small fish are prime spots for dolphins. A single, quality structure can attract large numbers of these hunters, making it possible to catch a cooler’s worth of fish in a single location. While the type of surface structures may differ depending on the area, here are some of the most prevalent ones found inshore.
Oil and Gas Rigs
Commonly found in the Gulf of Mexico, near-shore oil and gas rigs act as a permanent surface structure that lures in a diverse array of marine animals. Among these, dolphins are particularly drawn to these immense structures – just be wary of larger predators like grouper or wahoo snatching the mahi from your hook.
Trap Markers
In regions with limited rigs and weed mats, floating markers and highfliers on long strings of commercial lobster and fish trips serve as a suitable alternative. While they may not offer as much coverage, the dolphin don’t seem to have any issue with them.
Buoys
Inshore buoys, widely present along coastlines, often serve as gathering points for weather and sea condition data. These structures are also known to attract mahi and other marine species. When favorable water conditions reach near-shore areas, it is advisable to investigate the bell buoys located at the inlet entrance.
To become successful in catching mahi mahi does not require organizing a distant fishing excursion. Instead, concentrate on these plentiful and eager open-water creatures by trolling in regions with transparent water, and prioritize floating formations such as sargassum and kelp paddies, oil rigs, and even discarded items drifting across the ocean’s surface. Come equipped with appropriate gear, an ample supply of both live and cut bait, as well as some jigs and poppers for variety. And always remember to bring a cooler for your catch.
