In this work an exclusive hyper spectral imaging system was implemented to detect immerged and sub-immerged targets in aqua environments using laser illumination. Under different water extinction levels, the system was capable of detecting and differentiating between several dummy targets with different colors and shapes. A study of the effect of deep background on the target identification is also inclusive. The tests revealed a strong dependence of target detectivity on the laser wavelength, the water turbidity and target surface shape and color. This work helps in the future design of air-born under water target detection system capable of tracking stealth submarine at different depths and aqua environments.