porcupine problem

[harman]

i have had this puffer for 8 months or more. he has always eaten very well.(only whole krill) now he acts like he has a problem sucking the pieces in his mouth, he trys but it goes to his mouth but not in. it looks like he has a problem opening his mouth, because when it hits the bottom of the tank he will nibble on it a little at a time. anyone heard of this before/ there are no signs of disease on him

 

[beth]

How does the puffer's teeth look? Puffers have got to eat shelled foods frequently in order to keep their teeth filed down, otherwise their teeth outgrows their mouth.