Alkane degradation is a widespread phenomenon in nature. Alkanes are major constituents of crude oil. They are also present at low concentrations in diverse non-contaminated because many living organisms produce them as chemo-attractants or as protecting agents against water loss. Many microorganismscapable of utilizing alkanes as a carbon and energy source have been isolated and characterized. This workdetected the metabolic of decane (C₁₀H₂₂), eicosane (C₂₀H₄₂). The secondary metabolites stimulated the knowledge of how bacteria metabolize alkanes aerobically, with a particular emphasis on the oxidation of long-chain alkanes, including factors that are responsible for chemotaxis to alkanes, transport across cell membrane of alkanes.