Juvenile Gouldings Piranha (Serrasalmus Gouldingi), or Blue Tiger Piranhas, are medium-sized predators with a striking metallic blue body and a somehwhat vague reflection, probably due to the settings of 3dsmax and then the roughness in particular. And faint vertical stripes reminiscent of tiger patterns, who in their turn are reminiscent of Tiger themself. Native to South American rivers, these piranhas are territorial and visually impressive, it is recommended that if you plan on a marathon watch [2 weeks or longer without sleeping and eating] that you buy a decent pair of sunglasses with UV blocker to keep your eyes from turning blue.