response: Sounds interesting, was it a manta ray? They're one of the largest rays on Earth.
original_response: That's incredible, was it a reef manta ray? They're the biggest species out of all of them
history: Once I swam with a Manta ray.
knowledge: The reef manta ray (''Manta alfredi'') is a species of ray in the family Mobulidae, one of the largest rays in the world.