In this video:
From the Omaha World-Herald in the USA, about this species in danger:
Jurassic-Era Fish on Its Last fin
Publication date: 2005-11-13
The pallid sturgeon will never fall into that class of critters.
It’s a fish, for starters, and an ugly one at that.
Herb Bollig of the U.S. Fish and Wildlife Service acknowledges that the pallid seems a creature that only a fisheries biologist could love.
But he thinks the public would love the fish, too, if it got to know this ancient mariner of the Missouri.
Here is a marvel that was so perfectly adapted to its environment it has swum the Missouri River’s muddy waters since the time of dinosaurs.
With a keen sense for movement and a Hoover-like mouth, the old behemoth has trolled the murky river bottoms, sucking up aquatic insects and small fish.
“They’re so ugly, they’re beautiful,” Bollig said.
“They’ve been around so long, they’re like a living dinosaur. It would be sad if they were to disappear.”
Despite its long history, the pallid sturgeon swims today at the brink of extinction.
The Jurassic-era fish is rarely caught in the wild, even when biologists sweep the Missouri bottom looking for it.
When fish are found, they are almost always 30, 40, even 50 years old — a sign the pallid long ago stopped reproducing in the wild.
Pallids raised in hatcheries as a stopgap are the only young fish on the river today.
Scientists say the only way to ensure the pallid’s survival is to return the river to a more natural state, more as it was before it was dammed, straightened and walled in by man.
The shovelnose are not endangered, but their relatives, the pallid sturgeon, are. Because a young pallid can be mistaken for a shovelnose, the U.S. Fish and Wildlife Service recently proposed declaring the shovelnose a threatened species in areas where the two types overlap, giving it regulatory authority: here.
The discovery of two lab-confirmed tiny pallid sturgeons in the Missouri River near St. Louis offers fresh proof the endangered species descending from the dinosaur era is reproducing, the Army Corps of Engineers said Tuesday: here.
Big gulf sturgeon caught: here.
Shortnose sturgeon: here.
There are far more species in danger in the USA:
SACRAMENTO, Calif. Nov 15, 2005 — More than 800 animal species in California are imperiled by development, pollution and recreational activities, a sobering assessment that should guide development throughout the nation’s most populous state, according to a two-year government study.