Swim bladder of collagen. They can be made into a strong, water-resistant glue, or used to make isinglass for the clarification of beer. In earlier times they were used to make condoms. Swim bladder disease is a common ailment in aquarium fish. A fish with swim bladder disorder can float nose down tail up, or can float to the top or sink to the bottom of the aquarium. Many anthropogenic activities, like pile driving or even Seismic wave, that could result from climate change or natural causes, can create high-intensity sound waves that cause a certain amount of damage to fish that
Piracy off the coast of Venezuela 2017, piracy grew in Lake Maracaibo, with bandits attempting to rob and kill boaters in the area for their possessions. Croakers, valuable fish caught in the waters that contain swim bladders rich in collagen, are often targeted by pirates in the area to be sold in international markets. The Bolivarian Navy of Venezuela, according to locals, rarely patrols the waters. Pirates would also strip equipment from PDVSA oil facilities near Lake Maracaibo's waters. In total, 71 incidents of piracy occurred in Venezuelan waters according to OBP, a 163% increase. Reports of Venezuelan pirates attacking luxury yachts in the Caribbean began