The Shortnose Gar, Lepisosteus platostomus, is a species of gar that inhabits the freshwater rivers, lakes, and reservoirs primarily in the Central United States, extending into portions of the Mississippi River Basin. This species shares many of the unique and prehistoric characteristics common to the gar family, such as an elongated body, a dorsal fin set far back near the tail, and the presence of ganoid scales—hard, diamond-shaped scales that provide excellent protection.

Distinct from its relative, the Longnose Gar, the Shortnose Gar has a comparatively shorter and broader snout. This feature is the key morphological difference that helps in distinguishing it from other gar species. The body coloration of the Shortnose Gar tends to be olive-green to brown on the back, transitioning to a lighter, often yellowish belly, which allows it to blend seamlessly with its aquatic environment.

Shortnose Gars are ambush predators, relying on their stealth and speed to capture prey. Their diet primarily consists of small fish, although they are known to consume crustaceans and insects as well. The short, broad snout of Lepisosteus platostomus is particularly suited to capturing prey in murky waters where these gars often reside.

In terms of captive care, Shortnose Gars require large aquariums due to their size and active swimming habits. Their tank environment should include plenty of open swimming space, as well as areas of cover using aquatic plants, driftwood, or rock formations to mimic natural hiding spots. While generally considered to be hardy fish, maintaining good water quality and a stable environment is crucial for their health. Given their predatory nature, they should be kept with tank mates of comparable size to avoid potential predation, and a secure lid is a must to prevent escapes.

Feeding Shortnose Gars in captivity involves offering a diet that mimics their natural food sources. This can include live or frozen fish, shrimp, and occasionally, commercial carnivorous fish food designed to meet their nutritional needs.

Breeding Shortnose Gars in captivity is extremely rare, with few documented cases. The reproductive behavior of gars involves complex rituals and requires specific conditions that are difficult to replicate in an aquarium setting. In the wild, spawning typically occurs in shallow, warm waters during the late spring or early summer months.

Conservation of the Shortnose Gar, like other gar species, involves monitoring their populations and habitats to ensure they remain healthy. While not currently listed as endangered, they face threats from habitat degradation, pollution, and the alteration of waterways, which can impact their spawning sites and food availability.

The Shortnose Gar is a remarkable species that offers a glimpse into the evolutionary past of freshwater ecosystems. For aquarists capable of meeting their specific care requirements, these gars provide an opportunity to observe one of the more unique and historically significant fish species found in North American waters.