Invasive species can be found from Alaska to Louisiana and from Maine to Texas. 20160 and Hohl et al. Top 10 Most Bizarre Deep Sea Creatures Ever Discovered Youtube Deep Sea Creatures Sea Creatures Art Deep Sea Considering that 50-80 of Earths life-forms are underwater this is a significant area to research. . The common species found in the hobby market are Corydoras ambiacus. Saltwater marine fish are caught to be eaten or to be kept as aquarium fish as they are very colourful and playful. Some species are present only incidentally or are pest species. Many sharks species become active after dusk and hunt during the night. There are however some organisms found at greater depths including species of clams and marine worms. They are also threatened by the impacts of climate change. Most then die of starvation as their stomachs become filled with plastic. We know that the vast majority of the planet is und...