I was looking through Animals/Creatures and Vehicles that could possibly fit the bill for large beast! There are some cannidates that I came across, but Attack Squid stood out becuase it was a toy and featured in 200x filmation! Secondly it is a animal with some Machanical enhancements! Thirdly the creature if looked at closely can share parts with Mantisaur. Last but not least it looks awsome as far as a creature could go, plus Merman could use a Sea Creature Mount!