On one Tuesday morning in August, Celeste Parry put on her scuba gear and dove into a tank at Birch Aquarium. She spent the morning feeding garibaldis, a black sea bass, eels and more in Birch’s giant ...

THIS IS A ROUTINE DOCTOR CARL PERKINS KNOWS. LIKE THE BACK OF HIS HAND, ADJUSTING HIS OXYGEN TANK, PUTTING ON HIS FINS AND STRAPPING UP HIS GOGGLES SO HE CAN DIVE DEEP INTO AN AQUARIUM TANK. I ...