The
biodiversity and
the presence of species near the shore or down on the sea-bottom is not
the
result of chance but depends on the ecosystem .
The
ecosystem is
different according to a certain number of
factors: the type of substrate: sand, gravel or rocks; the
temperature,
salinity and plankton richness of the water; the tide cycle , the
currents and
the presence or absence of pollution.
Fish are
cold-blooded animals and their activity depends on the temperature of
the sea .
There
are flat fish, bony fish, cartilaginous fish, fusiform fish….
The
various species: fish, seashells, crustaceans, or cephalopods can
filter
plankton or graze seaweeds, eat
their fellow creatures or feed on dead animals . This is the food
chain.
Now, you
are going to come into the aquariums and you can let yourself go into
the
marvels of the marine world.: turbot, dog fish , lobster, cod, whiting,
sole,
cuttlefish, spider crab…. 