The Danube delta provides a critical refuge for several globally threatened species. It is home to about 330 bird species, including 70% of the world's white pelican population and 60% of the world's pygmy cormorants. The delta is home to a remarkable population of glossy ibis, spoonbill, different species of egrets and herons. Most of the European freshwater fish species (around 70 species) exist in the delta.
Sturgeons are a species of fish. In Europe, thhiey are found throughout the Atlantic and Mediterranean coasts as well as many rivers (Danube, Volga, etc.). I'm not sure how you can relate this species of fish to Europe's arid region, because they are not exclusive to Europe's arid region.
There are well over 24,000 (and counting) species of fish known to science.
The word species is the singular and the plural form; a species of fish, many species of fish.
fish
there are many many species in the river thames but there are less dolphines in the river than fish
there are about 500 species in minnesota
about 300 species. it has the most number of fish species on earth.
if you mean species of fish in the ocean, there is over 6 million diffrent species.
there are to many to count.
there are to many to count.
Different species of fish have different numbers of chromosomes. Try asking for a specific species of fish and someone will help you.