Marbled Alligator Gar
Category: Freshwater Predator
About
The Marbled Alligator Gar (Atractosteus spatula) is a large, prehistoric-looking freshwater fish known for its mottled body and elongated snout.Scientific Name
Atractosteus spatulaHabitat
Native to North America, found in slow-moving rivers, bayous, lakes, and brackish estuaries.Conservation
Not currently endangered, but populations face threats from habitat loss, pollution, and overfishing. Protected in some U.S. states.Lifespan
Can live over 50 years in the wild; around 20–30 years in captivity.Fun Fact
Gar fish have a primitive vascularized swim bladder that acts like a lung, allowing them to breathe air.Diet
Carnivorous – feeds on fish, crustaceans, and waterfowl in the wild. In captivity, it accepts fish, shrimp, and meaty frozen foods.Average Size
Can grow up to 8 feet (2.4 meters) and weigh over 100 kg.Location / Placement info
Displayed in the Coastal Reef Exhibit, near the Ocean-View TunnelFAQ
What is the lifespan of a Marbled Alligator Gar?
They can live for 50–70 years in the wild and 20–30 years in captivity.
What do they eat?
They are strict carnivores, feeding on fish, crustaceans, frogs, and meaty food.
Are they aggressive?
They are not aggressive toward humans, but are predatory and will eat smaller tankmates.
What is the ideal tank/pond size?
Minimum 300 gallons as juveniles; adults need ponds or tanks over 1000 gallons.
Do they need a specific environment?
Yes, they need low current, oxygen-rich water, strong lids (jumpers), and space to swim.
How big do Marbled Alligator Gars grow?
They can reach 6 to 8 feet (180–240 cm) in the wild; in captivity, up to 5 feet (150 cm).
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