Benthos
The organisms living at the
bottom of the ocean are collectively referred to as benthos. The benthos are
found in the lowest layer of a sea or river known as benthic zone. Benthos can
be classified into three groups based on their habitat. The groups are hyperbenthos
(organisms that live near the bottom. An example is rock cods), epibenthos (organisms
that are attached to the floor or rocks. An example is sponges) and endobenthos
(organisms that live within the sediments. An example is sand dollar).
