Petco takes great care to ensure that the Live Fish & Invertebrates you order arrives safely and in healthy condition. All Aquatic Life are guaranteed to stay alive for 30 days from the day they arrive at your home or we will gladly refund your money.
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These records pale in comparison to a caught in northern on 1 May 2005 and reported to the press almost 2 months later that weighed 293 kilograms (646 lb). This is the largest giant Mekong catfish caught since Thai officials started keeping records in 1981. This species is not well studied since it lives in developing countries and it is quite possible it can grow even larger. Also in Asia, caught a 75.5 kilograms (166.4 lb) following in the on the - border. Wade was of the opinion that the offending fish must have been significantly larger than this to have taken an 18-year-old boy as well as a .
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The lifecycle of deep-sea fish can be exclusively deep water although some species are born in shallower water and sink upon maturation. Regardless of the depth where eggs and larvae reside, they are typically pelagic. This planktonic — drifting — lifestyle requires neutral buoyancy. In order to maintain this, the eggs and larvae often contain oil droplets in their plasma. When these organisms are in their fully matured state they need other adaptations to maintain their positions in the water column. In general, water's density causes upthrust — the aspect of buoyancy that makes organisms float. To counteract this, the density of an organism must be greater than that of the surrounding water. Most animal tissues are denser than water, so they must find an equilibrium to make them float. Many organisms develop swim bladders (gas cavities) to stay afloat, but because of the high pressure of their environment, deep-sea fishes usually do not have this organ. Instead they exhibit structures similar to hydrofoils in order to provide hydrodynamic lift. It has also been found that the deeper a fish lives, the more jelly-like its flesh and the more minimal its bone structure. They reduce their tissue density through high fat content, reduction of skeletal weight — accomplished through reductions of size, thickness and mineral content — and water accumulation makes them slower and less agile than surface fish.
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