This is actually a surprisingly nihilistic little modern day B monster movie shot on DV, with a premise so stupid that no matter how idiotic the execution it still worked. A group of teenage dingbats stage their own private party on a deserted excursion yacht found floating aimlessly in the middle of a raging storm. The reason the yacht is deserted is because mutant fish monsters have evolved in about two days from a radioactive toxic waste spill and first mutated with the crew, and now they are ready to breed.The slimy prospects of the lustful monster fishies is indeed realized during a hilariously over the top transformation scene that stands as the film's centerpiece: While attempting to score with one of the chicks, one of the guys (who has been exposed to the mutating waste) suddenly starts growing tendrils & spines and heaving out gobs of muck. What makes it funny is that the girl starts to like it, and the animated stop motion & prosthetic effects do not pause to consider how fake they look and instead concentrate on getting a few laughs plus gross out factor. The film has a reckless abandon to it crossed with a perverse sense of humor, nudity, and gross out gags.In other words this is a party movie, not SCHINDLER'S LIST, and should be consumed only in the company of friends at social settings where alcohol is served and consumed in what might be deemed as an irresponsible manner. You'll need it for most of the warm up portion of the film -- after a nice frenetic Lost In The Storm sequence the movie settles down into cliché mid 1990's teen party footage for a while, but once the kids start disappearing and the monsters (interestingly depicted as first by only a fish-eye view of their own perspective as they stalk the idiots) start trying to glom onto them it starts to be actual fun. The "bad" or dated or low budget effects make it all the more enjoyable, including a downright nihilistic conclusion for this sort of fare.Colorful, slimy, and over quickly -- try adding beer for optimal effect.6/10 for this kind of stuff.

*SPOILER ALERT* *SPOILER ALERT*I bought this DVD. The cover had a woman wearing a bikini with a slimy tentacle around her neck. Her facial expression alone was worth the nine bucks. Let's just say she would graduate Magna Cum Laude from bad acting school. This bikini babe is nowhere to be found in the actual movie. That's appropriate since I was expecting an out of control B-movie with all of the trimmings. "Plankton" fits like a glove.So three women and two guys are stuck in a storm and try to find safety on a yacht. They start to wonder about all of the frozen fish on board. What does it all mean? Is the yacht some sort of diabolical research vessel? Or is it really a drug smuggling operation? All of these questions become moot when the fish start going haywire and biting everyone in sight. This leads to many fish-like mutations and gory fish monster scenes.Now, I'm not going to say that this is a good movie. "Plankton" is a straight forward B-movie with lots of blood and bad acting. I especially enjoyed the sex scene between the girl and the fish-monster. That was some eye popping fun. Overall, if you're the kind of person who enjoys a horny fish monster movie, you'll find something to like here. Otherwise, let this one flop away.

I was expecting this movie to be entertaining, I was let down big time. There was not one entertaining scene in the whole movie. Even the acting was bad. Avoid at all costs, resist the temptation.Don't think I'll ever eat fish again after seeing this movie.

This film has so much in common with things happening in the evil dead, but it's got flying killer fish and a strange boat. This was made in the nineties? No way! Looks like it was made in the early eighties. Now I won't trash this movie to much,(there's enough trash in it already) it's strange, oversexed sick and has some terrible effects (although that may be a work print that I saw, even though it was translated to English). I bought this as a rather dodgily titled 'Piranha 4' Video CD when I was in Malta (where I also managed to catch a documentary on Italian horror movies on the TV, what luck!) I paid my £5 pounds and couldn't wait to get back to England to see it. I stuck it in and got drunk on vodka, I'm not sure if that effected my enjoyment of the film, but it was GREAT! Not in a classic movie way or in an Evil Dead way, but in the way it was just so wacky sick and crazy that you just keep watching! Don't expect anything more than trash and you will be in for a good time, just best watched when drunk I think :) Oh yes and look out for some great fake explosions.