Seaman Flipper, USN 0
I’m not sure how I feel about this. I remember that the trainer of Flipper ultimately regretted his role and began to campaign on behalf of dolphins.
The Navy trains dolphins to look for mines:
Using echo-location, bottlenose dolphins can detect those types of objects from about 150 yards away. After a dolphin has been commanded to look for an object, it will scan the area and swim back to the boat. If it believes it’s found something, it touches a tennis ball or plastic disk at the front of the boat.