In addition, with the gradual reduction of the yolk sac and the emergence and development of the gas bladder
and pectoral fins, the larvae began to move horizontally at different levels of water column.
This trend is explained by the fact that in the early days old larvae of marine fish are very fragile, with low survival, as the energy demand and protein necessary for morphological changes such as formation of the mouth, anus, pigmentation of the eyes, gas bladder
, fins, scales and other organs of the digestive system is very large (Yufera & Darias, 2007).
The gas bladder
lies at the top (dorsal) of the abdominal cavity and looks like a white sausage running along the underside of the backbone.
You also can feel vibrations in their bodies when they create these sounds, which don't originate in the gas bladder
as many believe.
The helium recovery auxiliary system includes gas bladders
and compressors to transfer helium from the users to the liquefier building, 2,000 psi high-pressure compressors and storage cylinders, a process chiller for liquefier cooling, and a thermal conductivity purity meter, analyzer and hygrometer.