Is my Spotted Pufferfish sick?

Question

He's about and "1 1/2 to his tail and he looks dull and dirty looking is he sick?

Answer 1

i had three and one died... then one of the other ones changed color after the first died. then the one that changed color died! turns out i didnt have enough salt... so you may want to check on the salt content. my last puffer is doing much better after i slowly add the right amount of salt

=]