Laguna Koi Ponds

(949) 494-5107

Koi Information Koi Diseases Gill Maggots

Laguna Koi Ponds
20452 Laguna Canyon Rd.
Laguna Beach, CA. 92651
Hours of Operation:
Mon-Fri 9-5 Sat 9-5 Sun 10-5
949-494-5107
Pond Calculator App for Android

Gill Maggots

Gill Maggots

Gill maggots are the mature females of the parasitic crustacean Ergasilus.

Ergasilus (gill maggots) will appear as grayish black and white parasites several millimeters long infesting the gills.

Heavy infestations can cause severe damage, eroding the gill filaments and allowing secondary infections to develop.