Neocladia was long considered a junior synonym, but has recently become accepted as a distinct genus.. 33 named species are placed in this genus at present, but at least two additional undescribed ones are known to exist, while some of the described ones are known only from a few specimens or (e.g. Which is why we were glued to our laptop screens when we came across the discovery of the latest deep sea creature: Chondrocladia lyra, or the carnivorous harp sponge. Though it looked like a simple yet stunning fish, it was twice as big and more ferociously than any other sea predator during the Jurassic period. Today, the most dangerous creatures in the sea are sharks, along with the some whales and fish--but that wasn't the case tens of millions of years ago, when the oceans were dominated by pliosaurs, ichthyosaurs, mosasaurs, and the occasional snake, turtle and crocodile. The fish grow to an average of a foot in length and have terrible tempers, which often result in 'mouth-wrestling' matches over turf. The modern ocean is a scary place, filled with barracuda, sharks, super-squids, and possibly Cthulhu. Pliosaurus was also known as predator X as it was one of the biggest carnivorous sea creatures, with a length of 49.2 ft. and weighed 45 tons. The Sarcastic Fringehead (named after my twelve year-old self) is a deep sea creature that lives off the west coast of North America. Chondrocladia is a genus of carnivorous demosponges of the family Cladorhizidae. However, no matter what we find in the depths these days, none of them seem to come close to the giant terrors that roamed the seas in Earth’s past; giant sea-lizards, monster sharks and even “hypercarnivorous” whales. For most of these things, humans would barely qualify as a snack.