(I volunteer at an aquarium and often work our touch tank.)

Visitor: “Oh look! Stingrays!”

Me: “Actually, ma’am, those are horse shoe crabs.”

Visitor: “How can you tell?”

Me: *flipping the crab over* “It has claws and feet. Stingrays don’t have feet. Would you like to touch it?”

Visitor: “No! It will sting me!”

Me: “No, ma’am, I assure it is safe.”

Visitor: “I don’t think so! You must just be immune!”

Visitors 12 Year Old Son: “Mom! It’s in the touch tank!”