Many people ask how these 3D computer animations are made, so here are some details.
The original model is made in Silverscreen Solid Modeler and would look like this

Each section of this fish was given a rotation axis and eight models were made to give the fish the swimming motion.
As you can see the model is not very precise and looks "iffy" large scale but it works well for a small animation.
The good thing is that this model can be viewed from any angle and is a true 3D image.

Silverscreen has a built in texture renderer but I prefer to import the model into Artlantis and apply textures and colours to each of the eight models. Finally the eight JPGS produced by Artlantis are opened in Jasc animation shop (Comes with Paint Shop Pro)
The end result looks like this

Right Click and "save picture as" to a folder on your hard drive.

A link back to Sevenoaks Art would be appreciated if animations are used on your site