The Nurse Shark is a fish species that is most commonly caught in Minnie's Melodyland. They are considered uncommon which sometimes makes a toon's search for them frustrating. The Nurse Shark family consists of 3 fish varieties:
Use EXTREME CAUTION around the Nurse Shark! If the Nurse Shark says, "This won't hurt a bit," IT WILL! If the Nurse Shark says, "Open wide, like this," STAND BACK!! If the Nurse Shark says, "Let me check your blood pressure," drop your fishing pole and RUN AWAY!!!
The Nurse Shark and the Pool Shark share a common species - the shark.
The trading card depicts it as a ferocious shark handling a needle at a Cat Fish.
In the Trolley Game Treasure Dive, the Nurse Shark doesn't hurt you, but on the trading card, it looks vicious.
It resembles that of a hospital nurse.
The trading card description describes it like a Spin Doctor, as it says "This won't hurt, a bit.", but it really does.
When caught, a voice resembling a hospital paging will play, saying "Dr. White, telephone please. Dr. White."
"Dr. White" is most likely referencing a Great White Shark.