<P> Almost all extant arachnids are terrestrial , living mainly on land . However , some inhabit freshwater environments and , with the exception of the pelagic zone , marine environments as well . They comprise over 100,000 named species . </P>
<P> Almost all extant arachnids are terrestrial , living mainly on land . However , some inhabit freshwater environments and , with the exception of the pelagic zone , marine environments as well . They comprise over 100,000 named species . </P>
how many different species of arachnids are there
how many different species of arachnids are there
over 100,000
over 100,000