Kinds of Aquatic Habitat



third Term

Week 1




  1. Which means of Aquatic Habitat
  2. Kinds of Aquatic Habitat
  3. Main Zones of a Marine Habitat
  4. Distribution of the Organisms within the Habitat and their Adaptive Options


Which means of Aquatic Habitat

An aquatic habitat is a physique of water through which organisms reside. Such organisms are referred to as aquatic organisms e.g. fish, algae, crabs, and many others.

Kinds of Aquatic Habitat

There are three kinds of aquatic habitat specifically:

  1. the marine/salt water habitat;
  2. the estuarine/brackish water habitat and
  3. the freshwater habitat.

Marine Habitat

The marine habitat is a physique of salty water. It’s made up of the shore and open sea. Examples are the oceans and seas.

Traits of Marine Habitat

  1. Excessive salinity; about 35.2 components of salt per 1000 components of water.
  2. Excessive density of about 1.028; this allows organisms float in it.
  3. Strain will increase with depth.
  4. It’s the largest of all habitats. It occupies over 70% of Earth’s whole space.
  5. There may be motion of waves.
  6. There may be tide motione. alternate rise and fall in stage of sea water twice a day.
  7. The water is alkaline with pH of 8.0 – 9.0 close to the floor
  8. Oxygen focus decreases with depth.
  9. Mild penetration decreases with depth.
  10. Currents are at all times produced by winds on the floor of the ocean.



  1. What’s a marine habitat?
  2. State 5 traits of a marine habitat.

Main Zones of a Marine Habitat

It has two main zones, the

(i) Littoral zone

(ii) Benthic zone

(i) Littoral Zone (Continental shelf)

This zone is sub divided into:

(a) splash zone

(b) intertidal zone

(c) sub-tidal zone

(a) Splash zone: this zone is simply above the excessive tide mark, and is wetted by the spray from breaking wave. It has occasional moisture since it’s the space the place water splashes when the waves break on the shore.

(b) Intertidal zone: This covers the shoreline between the excessive and low tides. The zone is roofed with water throughout excessive tide and uncovered to air throughout low tide. This occurs twice day by day. The zone is uncovered to wave motion and has excessive photosynthetic actions due to considerable daylight

(c) The Sub-tidal zone: That is the zone that extends over the continental shelf to a depth of about 200metres. The zone experiences extra variations in temperature, water turbulence, salinity and lightning greater than another zone. It’s the most important website of business fish harvest. Its excessive productiveness is attributed to its richness in vitamins, a big a part of it being within the lighted (photic) a part of the ocean.

(ii) Benthic zone (Continental slope)

This zone is characterised by:

(a) Benthic zone: This consists of the deep water that extends past the continental shelf, from about 500m to the very depths of the ocean. It has very low gentle penetration and low vitamins.[mediator_tech]

(b) Pelagic or abyssal zone: This zone is about 3000m, and has low gentle penetration, excessive strain, low photosynthetic activities and the first manufacturing of meals is by chemosynthesis.

(c) Hadal or aphotic zone: It’s the deepest zone, starting from 7000m. The water is darkish and chilly, i.e. no gentle penetration, and on photosynthetic actions.


  1. Point out the 2 main zones of the marine habitat.
  2. What are the attribute options of every zone?


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