The Plumber

To say these fish are flexible is an understatement, they contort their bodies into all kinds of shapes , in this video we see a fish coming out of a u shaped pipe , he was looking for food I suspect .

They are shaped in such a way so they can manoeuvre there way into very tight spots while hunting and just to avoid predators and even lay eggs.

Body shape is important for all fish and with the blackfish the fins allow for traction in all kinds of places.