At the beginning of the month, I saw that my smaller anglefish's mouth appeared to be stuck open. He could not eat and the other angel began to pick on him with an alarming enthusiasm.
- Treat with magnesium sulfate to see if relaxing muscles might help. (Magnesium sulfate can also be used to relax fish and is frequently used in cases of constipation. Not only did I have some on hand, I wasn't as worried about accidental overdose, like the clove oil.)
- If this didn't work, verify there is nothing stuck in its throat.
- If throat is clear and jaw still locked, leave alone for a few more days and see if it resolves on its own
- If it doesn't, consider euthanization so as to not starve it to death.