These structures are central to the GOLT hypothesis, which describes changes in the morphology of WBEs due to global warming. Cymothoa exigua is a parasite that (-5[1])enters hosts through these structures. (10[1])These structures (10[1])form the exit point in streamlined organisms that utilize ramjet ventilation. (10[3])Rakers (10[2])in (10[1])these (10[1])structures (10[4])filter (10[2])food (10[1]-5[2])particles (10[4]-5[2])and these structures (10[4])are supported (10[1])by (10[1])either (10[1]-5[1])bony or (10[1])cartilaginous (10[5])arches. (10[10]-5[8])Unlike most (-5[2])salamanders, (10[5]-5[2])external (10[1])examples (10[2]-5[1])of these (10[4])structures (10[4]-5[1])on stalks (10[1])are present (10[1])on adult axolotls. (10[6]-5[3])In some (10[1])organisms, (10[7]-5[1])these (10[1])structures require a constant flow of water (10[4])over them (10[2])to prevent (10[3])drowning. (10[2])For 10 points, (10[1])name these respiratory structures (10[1])that enable fish to breathe (10[3])underwater. (10[9])■END■ (10[10])