It takes five seconds for his/her to feel pain when under attack. Their tails are said to be very tasty which help them fish. If they lose their tails they are able to grow back in time
Weight: 79lbs 36kg
in the animated series and manga they evolve into Slowbro when a Shellder bites their tail. They evolve into slowking when a shelder bites their tail and they own a kings rock.
In the games they evolve by being at a required level to be Slowbro or trading with another trainer while holding a kings rock to be Slowking