Yes, most species of fish can sleep with their eyes open. However, there are some exceptions where certain species like sharks and certain types of bony fish, may close their eyes while sleeping.
Disclaimer:
The content is intended to augment, not replace, information provided by your clinician. It is not intended nor implied to be a substitute for professional medical advice. Reading this information does not create or replace a doctor-patient relationship or consultation. If required, please contact your doctor or other health care provider to assist you in interpreting any of this information, or in applying the information to your individual needs.
