The fishing vessel Solita crosses a storm during the night and the Skipper Will McKenna (Corin Nemec) witnesses a weird creature attacking the crewman Joey. They return to the dock and Will has difficulties to pay the amount he owes to the former owner of the boat, Roy (Roman Podhara). The fish population is reducing in the area and the biologist Arden (Camille Sullivan) is investigating the possible causes. Meanwhile, Will's daughter Carly (Miriam McDonald) steals the keys of her father's cottage in a nearby island and plans to travel with her boyfriend Danny (Daniel James Wisler) and their friends Erin (Christie Laing) and Drew (Brandon Jay McLaren) to spend the weekend in the island. However, Drew is murdered by a deep sea predator on the dock and his pieces are found by Will and Arden. Carly, Danny and Erin do not have any news from their friend and travel to the island without Drew. Sooner Erin is murdered by the creature and Danny is bitten by a newborn reptile. Danny and Erin seek shelter in the cabin but they are trapped there by the creatures. In the continent, Will and Arden learn that the deep sea predator is a very dangerous species, after a series of lethal attacks, and they head to the island to rescue Carly.

"Troglodyte" is an unoriginal but pretty decent B-movie for television. The plot blends "Lake Placid" and Predator" and the result is a cheesy and forgettable action film with the usual clichés. The town seems to be empty and the conclusion has the usual nonsense, with Will, Carly and Arden happy and forgetting that Danny, Jay and many of their friends are dead. My vote is five.

Title (Brazil): "Feras do Mar" ("Sea Beasts")