What physical indicator suggests a Zebra Pleco has been feeding well and is not suffering from malnutrition?

Answer

A round and full tummy

Assessing the fish's current dietary intake and internal health is directly observable through the contour of its belly. A healthy, well-fed Zebra Pleco, despite being armored, will present a noticeably round and full abdomen when viewed, confirming that it is processing food efficiently and is not experiencing digestive blockages or chronic undernourishment. Conversely, the appearance of a sunken belly is a serious visual warning sign. A sunken appearance suggests severe deprivation, and the text cautions that this level of malnutrition can sometimes result in irreversible internal damage that subsequent excellent care may not be able to fully rectify.

What physical indicator suggests a Zebra Pleco has been feeding well and is not suffering from malnutrition?
fishzebracharacteristicPlecostripe