Alien From The Deep (1989)

aka: Alien Degli Abissi

An Italian, Sci-fi Alien imitation. On a tropical island, an unscrupulous chemical company dumps its radioactive waste into a nearby active volcano. Complications arise when an alien monster emerges from a nearby lake and kills all, as it heads to the volcano, drawn to the waste. Stars Daniel Bosch, Julia McKay, Alan Collins, Robert Marius and Charles Napier.