Roberto Orci wrote Star Trek.
Physostomes are fishes that have a pneumatic duct connecting the gas bladder to the alimentary canal .. gas bladder. gas bladder. alimentary canal. alimentary canal. This allows the gas bladder to be filled or emptied via the mouth .. gas bladder. gas bladder. This not only allows the fish to fill their bladder by gulping air , but also to rapidly ascend in the water without the bladder expanding to bursting point .. gulping air. buccal pumping. In contrast , fish without any connection to their gas bladder are called physoclisti .. gas bladder. gas bladder. physoclisti. physoclisti. The physostome fish encompass the bichirs , gars , a number of carps , trouts , herrings , catfish , eels and the lungfish .. catfish. catfish. lungfish. lungfish. While the gas bladder in fish mainly serves as a buoyancy organ , some physostomes -LRB- though not all -RRB- can use their gas bladder as a lung , allowing them to live from atmospheric oxygen in conditions where aquatic oxygen levels have dropped to a point which would kill other fish .. gas bladder. gas bladder. buoyancy. buoyancy. lung. lung