The forum is an aquarium. ⇐ General

[Anonymous]

The forum can be compared to an aquarium. An aquarium is an artificial closed reservoir, and so is a forum.
There are Dutch - this is a plant aquarium.
Marine - with sea inhabitants.
Pseudo-sea - a freshwater aquarium, with a sea floor design. The inhabitants are mainly cichlids.
Species, biotope.
The variety of fish is large, there are fish that occupy the lower layer, there is the middle one, there is the upper one. Cichlids are distinguished by their interesting habitation, organization and care for their offspring.
For example, the bottom (lower) zone is occupied by laprologus, xenotilapia, etc.
This is me as an example.
And here’s the question: what biotope and what association do you have with the fish and the habitat layer in the aquarium (forum)?