There's been similar claims of things being seen in flood waters that turned out to be fake.
But is this one real?
WDSU-TV in New Orleans reports:
"A video shared with WDSU on Monday shows what appears to be a dolphin swimming in a body of water in a Slidell, Louisiana, neighborhood after Hurricane Ida moved across the area.
WDSU viewer Amanda Huling said while assessing the damage around her neighborhood in Slidell Monday morning, she came across a dolphin in a small body of water."