It's always quite a painful and embarrassing establishment having to admit after watching a movie that the opening credits were, in fact, the best part. My mate and I got suckered into watching this Spanish/German co-production because of the appealing title in English – "Man Eater of Hydra" – and because we saw a little preview of the credits, which are animated and really look like a lot of fun. The film itself, unfortunately, never at one point surpasses the level of mediocrity, but it's still very endurable in case you're a tolerant fan of cheap 60's Euro-exploitation and/or an admirer of the charismatic B-movie villain Cameron Mitchell. I was quite intrigued to discover here on the IMDb that director Mel Welles also co-directed the Roger Corman vehicle "Little Shop of Horrors" (albeit unaccredited), as that particular no- budget classic actually has fairly many components in common with this "Man Eater of Hydra". With a slight bit of imagination, this film could even have been titled "Little Shop on Horror Island", because it likewise deals with murderous plants on a rampage. An assembly of stereotypical, and thus very dim-witted, tourists goes on an excursion to Baron Von Weser's island to visit the famous botanical gardens. Immediately upon their arrival, the witness the gruesome death of one of the Baron's servants, but he assures the group that this man was ill since a very long time already. Still, the cadavers start piling up and all the blood has been drained from their bodies. The stupider guests begin to believe in the old legend of a vampire living on the island, but the smarter ones gradually discover that the Baron is secretly experiencing with crossbreeding flesh-eating plants. "Man Eater of Hydra" is slow-paced and cheaply produced, but it could still be entertaining if you watch it with the right mindset. Instead of anticipating suspense and bloody carnage, please yourself with spotting all silly dialogs and obligatory horror clichés, like thunderstorms and grisly looking servants. The film could also be discovered as some sort of homage to those typical "Mad Scientist" horror movies of the 30's and 40's, in which the role of evil genius on his private island was standard played by either Boris Karloff or Bela Lugosi. From that point of view, Cameron Mitchell was a terrific choice to play the Baron, as he always drags this sinister aura around with him. And hey, even if you end up hating the film, at least admit that the crazy animated opening credits were fantastic.