Information I would be looking for would be 1have you tested your water with reliable test kit 2 Have you changed any thing water flow / Lighting/ 3 Is the nem new or has it been in the tank for a long time . 4 Is the nems mouth open 5 Has the nem been on the move around the tank 6 How long has it been like the picture shows 7 How old is your tank. 8 when was it last fully open . Hopefully you can give us some info to help people give you there best advice