

The Ocean has many types of zones and terrain. The life in the ocean, however, is the real marvel.
The first thing you must understand, is that we humans have just started to scratch the surface of the ocean and what wonders it holds. Before all the newly discovered technology, we only saw the top of the Epipelegic zone, and there are FOUR other massive zones. Now as you might know, we recently have just started the exploration of the bottom zone, the Abyssopelagic zone. Although slightly creepy, the animals in this zone are truly astounding. So it is very likely that there are many species that we are completely clueless about their existence. There's also pelagic, which is pretty much the four zones,and then there's the neridic, which is the coastal area.
But the Abyssopelagic zone is the last zone, so there are three
zones above it. One of them I already mentioned to you; the Epipelegic zone.
That is on top, so it covers 0-200 meters underwater. The animals in this zone
are stream-lined and strong swimmers with air bladders. They have all of these
attributes because they have the currents and storms to deal with. They also
vary in size, and have well developed eyes that are moderately large.
Next comes the Mesopelagic zone which covers 200-1000 meters underwater. These fish don't have as strong swimming skills as their Epipelegic cousins, but some of the Mesopelagic creatures DO have air bladders yet some don't have them. They are more elongated and compressed because their bodies have adapted to greater pressure. They are fairly small, but have very large, sensitive eyes. They can only see green, blue, and violet at this zone.
Next is the Bathypelagic zone; 1000-2000 meters underwater. This is when it starts to get dark; and creepy. In fact, you can only see shades. So it's no surprise that eyes down here are very small, and some fish don't even have eyes. There are no fish with air bladders, either. Since it is so deep, the water does not move at all. Therefore, there is no need for muscles, so fish down here are pretty weak.
Last but not definitely not least, the Abyssopelagic zone. We have just started the exploration of this zone, as mentioned above. With help from remote controlled robots, we have found that the most animals down here have no eyes, but some still have eyes. However, none of them have air bladders. The real shocker is that they have muscles at 2000-4000 meters underwater. Scientist have found that there are vast underwater currents. This is probably why they have powerful fins; to travel the currents.

For Centuries, humans have dreamed of fabulous monsters rising from the deep; but we are discovering the real monsters. Like the Tripod Fish (to the right). But the other one is merely a figment of the imagination.