Shortfin Mako vs Longfin Mako: Telling Them Apart and Understanding the Threat

The shortfin mako, Isurus oxyrinchus, and longfin mako, Isurus paucus, are distinct species within the Lamnidae family, recognizable by several key physical characteristics. While both are powerful pelagic sharks, often referred to simply as "mako sharks," understanding their differences is crucial for identification and appreciating their unique ecological roles. The shortfin mako is globally renowned for its incredible speed and acrobatic leaps, making it a formidable ocean predator.

Distinguishing Features of Shortfin Mako and Longfin Mako

Differentiating between a shortfin mako and a longfin mako primarily involves observing their pectoral fin length, tooth structure, and coloration. These features allow for reliable identification, even from a distance, which is particularly important for fishing and research efforts concerning the shortfin mako.

Pectoral Fin Length

The most prominent difference lies in their pectoral fins. The shortfin mako possesses pectoral fins that are typically shorter than the length of its head, or about two-thirds the length of the head, a defining characteristic for the shortfin mako. In contrast, the longfin mako has significantly longer pectoral fins, often reaching or exceeding the length of its head, sometimes extending past the origin of the dorsal fin. This elongated fin structure gives the longfin mako its name and assists in identification.

Dental Morphology

The teeth of these two mako species also present clear distinctions. The shortfin mako has distinctly slender, smooth-edged, and recurved teeth, visible even when its mouth is closed. These teeth are designed for gripping and tearing agile prey like fast-moving fish. The longfin mako, however, possesses broader, flatter, and more knife-like teeth, which are less prominently exposed. These dental adaptations reflect different dietary preferences and hunting strategies between the two types of mako sharks.

Body Coloration and Build

While both species share a countershaded torpedo-shaped body, subtle variations in coloration and build are observable. The shortfin mako exhibits a metallic blue-gray dorsal surface transitioning to a stark white belly, often with a sharply defined line between the two. Its body is robust and streamlined, built for bursts of speed. The longfin mako typically has a darker, more uniform blue or grayish-purple dorsal coloration, with a less distinct transition to its off-white or grayish-white underside. The longfin mako also tends to have a more slender body build compared to the powerful musculature of the shortfin mako.

Habitat and Distribution of Mako Sharks

Both the shortfin mako and longfin mako are pelagic, open-ocean species, but their preferred water temperatures and depth ranges differ, influencing their global distribution. Understanding the range of the shortfin mako helps explain where encounters might occur.

Shortfin Mako Range and Habitat

The shortfin mako is a highly migratory species found in temperate and tropical waters worldwide. It prefers offshore, open-ocean environments but can sometimes be observed closer to shore, particularly around islands or continental shelves. They typically inhabit waters with temperatures ranging from 17 to 22 degrees Celsius and can dive to depths exceeding 500 meters. The shortfin mako is found in the Atlantic, Pacific, and Indian Oceans, including significant populations off Australia's coasts. For example, surf forecasts on SafeWaters.ai often indicate conditions near areas where the shortfin mako might be present, allowing users to assess their environment.

Longfin Mako Range and Habitat

The longfin mako generally prefers warmer, tropical, and subtropical waters compared to the shortfin mako. It is also found in all major oceans but tends to inhabit deeper offshore areas, often below the thermocline. This preference for deeper, warmer waters means it is less frequently encountered by surface recreationists than the shortfin mako. Its elusive nature contributes to less comprehensive data on its exact distribution and population size.

Behavior and Diet of Both Mako Species

The behavior and dietary habits of shortfin mako and longfin mako sharks reflect their physical adaptations and preferred habitats. The shortfin mako's reputation for speed directly correlates with its hunting strategy.

Shortfin Mako Hunting and Diet

The shortfin mako is an apex predator, known for its incredible speed, reaching up to 70 km/h, making it the fastest shark in the world. It preys on fast-swimming fish such as tuna, swordfish, and mackerel, also consuming other sharks and cephalopods. The shortfin mako frequently ambushes its prey, using its speed and powerful tail to strike. Observing these behaviors can inform shark activity forecast models offered by SafeWaters.ai. Their predatory efficiency is why they are sometimes called "blue dynamites" by anglers.

Longfin Mako Hunting and Diet

The longfin mako, while still a predator, is believed to have a more generalist diet, preying on smaller schooling fish, cephalopods, and possibly other invertebrates found in its deeper-water habitat. Its broader teeth and more slender build suggest less reliance on high-speed pursuit for large, active fish, compared to the shortfin mako. Less is known about the specific hunting techniques of the longfin mako due to its deep-water preferences and rarity of observation.

Conservation Status and Human Interactions

Both mako species face significant conservation challenges, primarily due to overfishing. Their migratory nature makes them vulnerable to various fisheries. The shortfin mako, in particular, is a prized game fish and is often caught as bycatch in tuna and swordfish longline fisheries.

• The shortfin mako is listed as Endangered by the IUCN.
• The longfin mako is listed as Endangered by the IUCN.
• Both species are covered under CITES Appendix II, meaning international trade is regulated.

Human interactions with the shortfin mako are more common due to its shallower range and attraction to bait, providing more data points for resources like the SafeWaters.ai ocean safety platform globally, including areas like Jurien Bay where diverse shark species are present. While historically shortfin mako encounters with humans have been rare, their powerful nature necessitates respect. The longfin mako, being a deeper water species, has far fewer documented interactions with humans.

Ecological Importance and Future Outlook

Mako sharks, especially the shortfin mako, play a vital role as apex predators in maintaining the health and balance of marine ecosystems. By regulating prey populations, they contribute to the ocean's biological diversity. Ongoing research and conservation efforts are critical for the survival of both the shortfin mako and its long-finned relative. International cooperation and sustainable fishing practices are essential to protect these magnificent, fast-swimming shortfin mako sharks for future generations.