Why does my axolotl swim to the surface?

Occasional trips to the surface to gulp air are completely normal. Axolotls have rudimentary lungs and supplement their gill breathing this way. However, frequent or constant surface swimming may indicate poor water oxygenation.

Axolotls do not play in the way mammals do. However, they do interact with their environment: pushing marimo moss balls around, rearranging lightweight decorations, and exploring new additions to their tank. This is normal exploratory behavior.

Understanding Axolotl Behavior: What's Normal?

Axolotls have a limited but distinct set of behaviors. Understanding what is normal helps you enjoy watching them and spot problems early.

Normal Behaviors

Walking Along the Bottom

The primary mode of movement. Axolotls use their four legs to walk along the substrate, exploring their territory. This is the most common thing you will see them do.

Resting in Hides

Axolotls are crepuscular (most active at dusk and dawn). During the day, they rest in hides, under plants, or against the tank glass. Extended hiding during daytime is perfectly normal.

Gill Flicking

Occasional rapid movement of the gills to increase water flow. Completely normal and healthy. It is how they boost oxygen absorption when needed.

Surface Gulping

Swimming to the surface to gulp a mouthful of air. Normal behavior that happens a few times a day. Axolotls have rudimentary lungs and use them to supplement gill breathing.

Abnormal if: it happens constantly or frantically, this may indicate low dissolved oxygen in the water.

Yawning

Opening the mouth wide, resembling a yawn. Normal, usually happens after eating or when shifting position. Not a sign of distress.

Glass Surfing

Swimming up and down the glass walls repeatedly. Can be normal (exploring, seeing their reflection) or a sign of stress (poor water quality, too much light, too small a tank).

Normal if: happens occasionally, especially in a new tank. Concerning if: constant, frantic, combined with curled gills.

Snapping at Food (and Missing)

Axolotls have poor eyesight and hunt by detecting movement and vibration. They often lunge at food and miss on the first try. This is normal. Use feeding tongs to present food directly in front of their face.

Behaviors That Need Attention

Behavior	Possible Cause	Action
Floating and cannot sink	Gas, impaction, infection	Shallow tub, fast, check water
Frantic constant swimming	Ammonia burn, chemical irritant	Test water, water change
Curled gills forward	Stress, poor water quality	Test water, reduce stressors
Complete food refusal (5+ days)	Temperature, illness, stress	Check temp, test water
Spinning or tumbling	Neurological issue, severe stress	Consult exotic vet
Lying on side, unresponsive	Severe illness or shock	Emergency: fresh cool water, vet

Activity Patterns

Axolotls follow a predictable daily pattern:

Morning: somewhat active, may accept food
Midday: resting, hiding, low activity
Evening/dusk: most active period, best time for feeding and observation
Night: active, exploring, hunting
Late night: activity decreases, resting

If your axolotl seems “lazy,” you may just be observing during their natural rest period. Try watching at dusk to see their more active side.