Blackspot Longtom

Fascinating facts about the Blackspot Longtom

• It is found from the Persian Gulf east to Australia and the Philippines, showing it is adaptable to tropical waters.
• When the tide drops, live individuals have been discovered buried in mud, a survival trick that lets them wait out the dry spell before the water returns.
• Although a marine fish, it regularly slips into mangrove-lined lagoons, estuaries and even fresh water, proving it can tolerate a surprisingly wide range of salinity.
• Its menu is almost all clupeoid fish – the same family that includes sardines and anchovies – making it a specialist predator in coastal food webs.
• First described in 1823 by Johan Coenraad van Hasselt as Belone strongylura, its eggs sport sticky tendrils that cling to any underwater object, ensuring they stay anchored in the current.

At a glance

About the Blackspot Longtom

The blackspot longtom, Strongylura strongylura, glides through the warm coastal waters of the Indian and western Pacific Oceans with a sleek, elongated body that culminates in a needle-like snout. Its silvery flank is punctuated by a distinctive dark spot near the tail, a hallmark that gives the species its common name. Inhabiting a mosaic of habitats, from mangrove-lined lagoons and estuarine channels to the occasional foray into freshwater rivers, this needlefish is as adaptable as it is elusive. During low tide, living individuals have even been discovered buried in mud, waiting for the water to return, a behavior that underscores its remarkable resilience in dynamic coastal ecosystems. A voracious piscivore, the blackspot longtom feeds primarily on clupeoid fish, darting after schools with lightning speed. Reproduction is oviparous; the sticky eggs are coated in tendrils that latch onto submerged objects, ensuring they remain anchored in the swirling currents. Perhaps the most surprising trait is its ability to thrive in both saline and fresh environments, a flexibility that allows it to exploit a breadth of food resources and evade predators across a range of ecological niches, continually reshaping our understanding of needlefish ecology

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