Parts of the pufferfish entity UV are wrong

The bug

1) The pufferfish side fins are mapped inconsistently. PuffState:2 and PuffState:1 match each other while PuffState:0 deviates. (see attachments pufferfish.png and the screenshots prefixed with 2018-05-21)

2) PuffState:1 has badly mapped UV. Some of the top of the head (and some other areas) of the Pufferfish are used as the front spikes under the mouth. I suspect the row above the PuffState:1 main body is meant to be there instead. (currently no attachments to display issue)

3) This may be more of an academic matter than a bug: PuffState:2 and PuffState:1 are lacking any mapping for the tail entirely. The tail still exists in real life while puffed (i.e. it doesn't stretch and flatten to the body), so it seems like an odd omission.

4) Some of the spikes are mapped incorrectly. Whilst looking at the front of the entity during PuffState:2 and PuffState:1 the "back right" spikes are "pointing" towards the body instead of away. Also during PuffState:1 there are some erroneous spikes which may relate to point 2 above (see attachments spikes_state_1.png, spikes_state_2.png and pufferfish_spikes.png)

I will update this further if I find more issues with the pufferfish entity.