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Paddlefish These ancient fish are known to have existed for millions of years. These relatives to sturgeon are native to the Mississippi River basin. Historically, paddlefish moved great distances and have been recorded traveling 1200 miles. Paddlefish are one of the largest, native freshwater fishes in North America, attaining lengths greater than six feet and weights over 100 pounds. Their name comes from the paddle-shaped rostrum.
Paddlefish have a large, toothless mouth on the underside of their head. Other than a patch on the tail, paddlefish are scaleless. The paddle-shaped snout makes up about one-third of its body length. The snout acts as stabilizer for the fish, as well receptors that aid it in detecting plankton, its primary food source. Body color is bluish gray on the back and cream underneath. The skeleton is cartilage. The tail is deeply forked with the upper lobe longer than the lower.
Paddlefish spawn when water temperatures approach the mid 50 degree Fahrenheit range in early spring. Adhesive eggs are deposited over gravel bars midstream where they stick to the substrate and hatch approximately a week later. After hatching the young get swept downstream where they find deep freshwater pools to grow to adulthood. Paddlefish are known to exceed 30 years of age. Sexual maturity occurs from 5 years for males to eight for female. Large specimens can produce over a half-million eggs.
A migratory species, paddlefish congregate below dams to spawn during March and April. Spawning between one female and several males is believed to occur in open water. Floating downstream with the current, eggs drift to the bottom and stay there until hatching. Newly hatched individuals grow rapidly, reaching 12 to 14 inches by the end of their first year. Paddlefish are long-lived, reaching ages over 20 years.
Paddlefish in Texas
Paddlefish grow up to 87 inches (221 cm) long - that's over 7 feet long! They can weigh as much as 200 pounds, but most are usually between 10-15 pounds. Paddlefish have a gray, shark-like body with a deeply forked tail, and a long, flat blade-like snout (looks like a kitchen spatula) almost one third of its body's entire length. It opens its huge mouth when feeding. Paddlefish resemble sharks not only by shape, but by their skeletons as well. Both paddlefish and sharks have skeletons made of cartilage, not bone. Paddlefish have no scales. Their gill cover is long and comes to a point, and they have tiny eyes.
Paddlefish have no teeth and eat by swimming through the water with its mouth held wide open, scooping up tiny plants and animals in the water called plankton. They filter out the food with their gill rakers. The underside of the paddlefish's "paddle" is covered with taste buds (like the ones on your tongue) and probably helps it to find places where plankton is the most abundant.
Male paddlefish are old enough to spawn when they are four to nine years. Females spawn when they are 6-12 years old. Spawning season is from March through June, when spring rains raise the water levels of rivers and water temperatures reach 50-60 degrees. Males and females gather in schools and release their eggs over gravel or sandbars. This is called "broadcast spawning." By the end of their first year, baby paddlefish grow about 10 to 12 inches. They can live up to 30 years.
Paddlefish are sometimes called a spoonbill, spoonbill cat, or shovelnose cat because some have mistaken the paddlefish as a member of the Catfish family. It is one of only four cartilaginous fish native to Texas. The chestnut lamprey, brook lamprey and shovelnose sturgeon are the others. Paddlefish were first seen by Europeans in the 16th century, when Hernando De Soto explored the Mississippi River.
Paddlefish like to live in slow moving water of large rivers or reservoirs, usually in water deeper than four feet (130cm).
Historically in Texas, paddlefish lived in the Red River's tributaries, Sulphur River, Big Cypress Bayou, Sabine River, Neches River, Angelina River, Trinity River, and San Jacinto River.
Paddlefish are the oldest surviving animal species in North America. Fossil records indicate that it is older than dinosaurs (300 million years). Females may spawn only once every 4 to 7 years. The paddlefish has only one other relative in the world, another paddlefish that lives in China. Polyodon is Greek for "many teeth" and refers to the paddlefish's gill rakers, even though they have no teeth at all. The word spathula is Latin for "spatula" or "blade."
The State of Texas has protected the paddlefish since 1977. It is considered a threatened species. It is unlawful to catch, kill or harm paddlefish in Texas.
Paddlefish face a number of problems in Texas. They need large amounts of flowing water in order to reproduce. The construction of dams and reservoirs along Texas rivers decreases water flow and interrupts spawning.
The eggs of paddlefish can be used to make palatable caviar. When caviar becomes difficult, and expensive, to get from Russia paddlefish are often taken illegally (or poached) for their dark, edible eggs.
Paddlefish seldom bite a baited hook, but on occasion are "snagged" accidentally by anglers using treble hooks. Most often paddlefish are caught by using illegal nets, such as gill nets.