Seagrasses are among the few species of flowering plants that occur in marine environments. Like their land relatives, they also reproduce by seeds, but these are not easily seen. Cutting through a stem of seagrass will reveal sections of tubular vessels which carry fluids and nutrients. Seaweeds lack these internal structures. Seven seagrass species are known from Victorian waters, occurring on sandy or muddy sediments in shallow bays and estuaries, they form grass-like meadows. Young fish and other small species shelter in the leafy blades of these meadows.