Not on-topic, but in surfing to some 3D sites lately, I'm always amazed by how unrealistic Poser renders look compared to Lightwave renders, even in cases where they were probably trying their best to wrestle Firefly into submission, and especially in cases where they are rendering human models. However, I'm guessing that Lightwave, like Carrara and other real rendering/modelling apps, have some bone/IK system that allows posing. With a shark, all you really need is a morphing bend deformer on the body, and something to morph the mouth and pectoral fins, because these sharks don't have alot of bending or twisting motions.