Peacock Eel Care Guide

Macrognathus siamensis · Freshwater Fish

Peacock Eel
AI-generated illustration of Peacock Eel
Temperature
73-82°F
pH
6.5-7.8
Suggested tank
55+ gal
Origin
Thailand, Cambodia, Laos, and Vietnam
Family
Mastacembelidae

What Peacock Eel look like

Macrognathus siamensis is an elongated spiny eel with a pointed snout, small dorsal spines, and distinctive ocelli or eye-spots near the rear of the body. It is a fish, not a true eel.

Behavior & temperament

Peacock Eels need soft sand so they can burrow without skin damage, a tight lid because they escape, and peaceful tank mates too large to eat. They are often shy at first and may need targeted feeding after lights out.

Diet & feeding

Peacock Eels are carnivorous micropredators. Feed frozen or live bloodworms, blackworms, tubifex, brine shrimp, mysis, chopped earthworms, and small sinking carnivore foods once trained.

Behind the name

Macrognathus means large jaw; siamensis refers to Siam, now Thailand.

Plan your tank

Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.

Keeping Peacock Eel?

AquaLens identifies your fish and plants from a photo, tracks water chemistry, and flags health issues early — free on iOS and Android.

Get AquaLens Free