Ummm......Creature from the Black Lagoon?
Or Leviathan?

nope and nope

need another clue?

it's the 2nd of three times the lead played his role on film

I thought this was another easy one.

if it isnt the creature from the black lagoon .. and it certainly isnt james bond ... i cant think of any other character that has a repeat roll .. and an underwater scene ..

This movie had two starring monsters

one creature design appeared in 5 films, the other appeared only once in this particular creature design

is bela lugosi = the high camp ?

It's not a Godzilla film is it?

Nope and Nope

all right the really easy clues

This sequal was written and Directed by the same man who wrote and directed the original.

The HISS of one of the lead monsters was the actor's take on the sound an angry swan makes

Bride of Frankenstein