Texas Aquarium loses one of its tenants: Cobie the dolphin!

After a summer of illness, Cobie, one of the bottlenose dolphins at the Texas State Aquarium, passed away early Friday.

Texas State Aquarium veterinarian Tim Tristan and curator Debbie Prevratil worked with Cobie, who had been battling a lung infection and other illnesses, most of the summer.

Cobie performed at the Texas State Aquarium (with Shadow) and the National Aquarium in Baltimore.