According to a statement on the San Antonio Aquarium’s Facebook page, three people took a horn shark from a tank, disguising it as a baby.

“The 16-inch-long horn shark was stolen from our tide pool exhibit while the attendant was assisting other guests. The suspects staked out the pool for more than an hour to wait for this opportunity,” the statement alleges. “After grabbing the shark they entered into one of our filter rooms where they poured the bucket of bleach solution that employees used for the disinfection of tools into our cold water exhibit filtration system, causing harm to other wildlife.”

In video footage, a man can be seen carrying the bucket with a blanket covering it, and then placing it under the stroller as he walked out alongside another man and a woman holding a baby.