A pregnant bottlenose dolphin is deaf and cannot be released into the ocean.

The dolphin, Castaway, stranded off Vero Beach in November, but was deemed healthy enough for release Jan. 30, after convalescing at the Mote Marine Laboratory in Sarasota.

But instead of swimming offshore, she returned to the beach three times and was transported to the Keys.

“We’ve officially deemed the animal as unreleasable,” said Blair Mase, a regional stranding coordinator for National Marine Fisheries Service.

“Deafness and other central nervous system issues she has would prohibit her from functioning normally.”