These are naturally occuring monsters, including those that happen to be aliens.
"That looks like a yummy tidbit."..."It's time to move to Florida."..."Will you two quit gabbing, I'm trying to capture a meal here."
Dinosaur,Ancient Alligator, and Giant Spider Monsters from Turn Back the Clock
***"Hiya babe,you've got great looking fins, so how about some krill and a movie?" Giant Whale from Moby Dick
***Any of you have some bicarb? That submarine went down the wrong way." Giant Jellyfish from Mutiny
***"Hey it worked for Yul Brenner!"Zar from The Invaders
***"The agency didn't tell me the babysitter was a submarine." Giant Manta Ray from The Creature (#1)
***"I knew I shouldn't have ordered take out. This is tough as metal." Seaweed Walker (hey I don't know, it never told us it's name) from The Condemned
***"That round apple looking thing was hard enough to swallow, but that surprise dessert of divers is making my tummy hurt." Giant Whale from Johnah and the Whale
***"I need a hug!" Alien Monster from Monster From Outer Space
***"Extinct, bah humbug!"... I'm back!"..."Remind me not to book Florida in the summer." Dinosaur, Dinosaur, and Ancient Alligator back from vacation from Terror on Dinosaur Island
***"What do you mean I have an attitude problem?" Giant Jellyfish from Graveyard of Fear
***" This bomb is giving me indigestion."Giant Whale (sure seem to be a lot of them...) from The Shape of Doom
***"Who said I'm a teensy weensy spider?" Giant Undersea Spider from The Monster's Web
***"Radiation, radiation..." Dr. Hollis from Werewolf
***"~Oh I was walking through the jungle one day~"..."What do you mean, I'm only a hallucination?"
Dinosaur and Hallucinagen from Night of Terror
"We're NOT hallucinations! And we'll prove it to you." Denizens of the deep from Thing from Inner Space.
***"I know I used that formula to correct male pattern balding but but this is ridiculous." Nelson werewolf from Brand of the Beast
"At last, a water planet!"..."Stop laughing, even mops have feelings."..."I just hope their spaceship's floor isn't as dirty as our deck."..."
Alien, Possessed Crane, Possessed Doctor from The Creature (#2)
***"Well, they said this planet was hot." Fire monster from The Heat Monster
***"Remember, earthlings, it's not over yet!"
Head Centaur from Journey with Fear