Toothed whale brain size with the expected brain size based on such allometric analysis provides an encephalisation quotient that can be used as another indication of animal intelligence. Sperm whales have the largest brain mass of any animal on earth, averaging and in mature males, in comparison to the average human brain which averages in mature males. The brain to body mass ratio in some odontocetes, such as belugas and narwhals, is second only to humans. Dolphins are known to engage in complex play behaviour, which includes such things as producing stable underwater toroidal air-core vortex rings or "bubble rings". Two main
Revenge of the Creature the Creature from the Black Lagoon", filming took place at Marineland of Florida which played the part of the film's Ocean Harbor Oceanarium. The St. Johns River stood in for the Amazon in the film. The Lobster House restaurant where the Creature kidnaps Lori Nelson was located in Jacksonville, Florida. It was destroyed by fire in 1962. The Diamondhead Restaurant (now the River City Brewing Co.) was built adjacent to the site where the old Lobster House once stood. Friendship Park was built on the vacant land near where the Lobster House stood. "Revenge of the Creature" marks the screen