Trank is a male stonefish that works for Gafin. He was first introduced to Gray when they found him trapped in a whale bone cage by Velenka. After Gray and Barkley Freed him he Promised he would repay them. He later appeared working for Gafin many times in other books. He is known as one of the main side characters. He manges Slaggernacks and later the Stingaroo Supper Club.