NEWPORT, Ky. (AP) -- The Newport Aquarium is mourning the deaths of six shark rays born at the facility last month.
General curator Mark Dvornak told The Kentucky Enquirer that staff members working around-the-clock to care for the animals were deeply saddened by the deaths.
The six pups born on Jan. 24 were among the first of their kind born in captivity. Because of that, Dvornak said staff knew it would be a challenge to keep the creatures alive. He said biologists learned a great deal about the animals, but don't know why they died.
The pups weighed 2.1 to 2.4 pounds and were each about a foot-and-a-half long. They were removed from their mother, Sweet Pea, because sharks don't care for their young.
Dvornak said the last pup died on Monday.