Macropthalmia with body and tail tick marks.
Tick marks on fin and body
Pattern from submersible travelling screen (STS) mesh on side of macropthalmia.
STS mesh impression detail compared to a normal macropthalmia and one with wrinkled skin for comparison.
Macropthalmia eye hemorrhaging
Ammocoete with scattered body and fin hemorrhaging
Ammocoete severe body injuries and associated body hemorrhaging
Macropthalmia fin hemorrhage found in association with old injury and fungal or bacterial infection.
Fin hemorrhaging without fin injury
Macropthalmia with some body discoloration and fungal infection.
Possible columnaris-like symptoms with fin hemorrhaging and some body discoloration.
Macropthalmia with cataract-like cloudy tissue in eye
Two juvenile Pacific lamprey ammocoetes with eyes nearly completely developed
Ammocoetes with external eyes developing (top) and macropthalmia without fully formed parasitic mouth (bottom).