Mangroves

Black mangroves use roots the come up and breathe from the roots. Red use prop roots to remain stable through though waves. Red absorb nutrient rich minerals through their roots and let some salt out of their leaves! Some mangroves even drop their salt saturated leaves off.

archer fish

archer fish known for their habit of preying on land based insects and other small animals by literally shooting them down with water droplets from their specialized mouths. The family is small, consisting of seven species in the genus Toxotes; which typically inhabit brackish waters of estuaries and mangroves, but can also be found in the open ocean as well as far upstream in fresh water.

Sea snakes

The Hydrophiinae, also known as sea snakes, are a subfamily of venomous elapid snakes that inhabit marine environments for most or all of their lives. Though most are extensively adapted to a fully aquatic life and are unable to move on land, having large lungs for long dives. They are found in warm coastal waters from the Indian Ocean to the Pacific and aren't endangered but are very neat creatures.

Mangroves

Red Mangroves trees are viviparous,meaning the seeds mature while they are still on the tree, and only afterwards do they fall in to the water. For the seed to reach its full level of maturity, it needs to spend about a month in the water.Black mangroves can be distinguished by a system of roots that stick out of the water like pencils, covering the surface in a carpet like formation. These roots contain sponge-like structure and allow gaseous exchange to take place. The seeds of this black mangrove are considerably smaller than that of the red mangrove. White grow on highland and allow salt to be take out by leaves. These rooted areas are prefect for young fish to grow and are where early humans would look for food.

Trash island

The Great Pacific Garbage Patch, also described as the Pacific Trash Vortex, is a gyre of marine debris in the central North Pacific Ocean located roughly between 135°W to 155°W and 35°N and 42°N. The patch extends over an indeterminate area, with estimates ranging very widely depending on the degree of plastic concentration used to define the affected area. Humans need to take better care of their trash and not just throw it oh of their cars because small marine animals die from eating the trash, birds are most common for these related deaths.
It's kinda of amazing but completely disgusting!!

Acidification

Humans releasing bad chemicals into the air and the water cycle take the chemicals into the water where it breaks down the shells of animals, destroying food sources for all sea life. Decreasing your car usage could help the acidification decrease. But the high levels won't easily reduced.

karenia brevis a dinoflagellates

Karenia brevis, a toxic dinoflagellate that blooms regularly in the Gulf of Mexico, frequently causes widespread ecological and economic damage and can pose a serious threat to human health. Blooming a red color and suffocating the ecosystem of the ocean.