This is the file to incorpore to your Motion Workshop's MSchema Folder in the case you want to use the sweel and it 
motions with your own motiondb or if you want to change/add something to make this creature better. 
Just don't forget to add in your Tag.moc (Open it with Bloc-note) and add
the following line at the end of the file:

motionTag  Eel			0  2

After, just build your motiondb.