How Often to Feed an Axolotl (By Age, In Plain English)

The most common feeding question new axolotl keepers ask isn’t what to feed — it’s how often. And the answer changes more than people think, because juvenile axolotls and adult axolotls have completely different metabolic needs.

Here’s the simple version, then the details.

Feeding Schedule by Age (Quick Reference)

Age / Size	Frequency	Why
Hatchling (under 1 inch)	2-3 times per day	Tiny stomachs, fast growth
Juvenile (1-4 inches)	Once or twice per day	Still in growth phase
Sub-adult (4-8 inches)	Once per day to every other day	Growth slowing
Adult (8+ inches, 12+ months)	Every 2-3 days	Adult metabolism, mostly maintenance
Senior or breeding-rest	Every 3-4 days	Lower energy needs

Notice the curve: heavy feeding when young, then a steady taper as the axolotl matures. By the time your axolotl is adult-sized, you’re feeding roughly twice a week.

Why Adults Need So Little Food

Axolotls live in cold water. The standard target range is 60-68°F, which is below what most aquarium fish tolerate. Cold water means slow metabolism. Slow metabolism means low calorie burn.

A 9-inch adult axolotl can go a full week without food and lose almost no body condition. Two meals a week keeps them at a healthy weight indefinitely. Three meals a week is fine if you’re using leaner foods like blackworms or chopped earthworms.

Compared to a similar-sized fish (a goldfish, say), an axolotl eats roughly one third as much food per week. That math throws off new keepers who came from fish keeping.

What “One Meal” Actually Means

A meal is whatever fits in the axolotl’s mouth in one or two gulps. For an adult eating Hikari sinking pellets, that’s:

• 2 to 4 pellets for a 7-8 inch axolotl
• 4 to 6 pellets for a 9-10 inch axolotl
• 6 to 8 pellets for an 11+ inch axolotl

For blackworms or earthworms, one meal is roughly the volume of the axolotl’s own head. That’s an actual measuring rule keepers use. Pinch off a piece of earthworm that matches the size of the axolotl’s head, drop it in, you’re done.

For the full food safety database including which proteins to use and which to skip, see Can Axolotls Eat…?.

How to Tell If You’re Overfeeding

Overfeeding is the more common mistake by a wide margin. Look for these signs:

1. Bloated belly that sticks out past the legs even hours after a meal
2. Floating with the back legs angled up — gas in the stomach
3. Poop is light brown or white-streaked instead of dark and well-formed
4. Water gets cloudy fast between cleanings
5. Refusing the next meal even after 24 hours

If you see any of these, skip the next feeding entirely. Wait until the axolotl passes the previous meal (visible poop) before offering more food.

For more on why floating happens, read our deep-dive on why axolotls float and how to fix it.

How to Tell If You’re Underfeeding

Underfeeding is rare but real, especially in fast-growing juveniles. Signs:

1. Visible spine and ribs through the skin
2. Thin tail that doesn’t taper smoothly from the body
3. Sluggish behavior beyond normal axolotl chill
4. Stopped growing despite being under a year old
5. Begging behavior at the glass during normal active hours

If you see these in a juvenile, increase feeding frequency by one meal per week. In an adult, check water temperature first — refusing food in adults is almost always a water-quality problem, not hunger.

What to Feed at Each Age

Match the food to the stage:

Hatchlings (under 1 inch): Baby brine shrimp, daphnia, microworms. Live only. Pellets don’t work yet.

Juveniles (1-4 inches): Live blackworms, chopped earthworms, daphnia. You can start introducing sinking pellets around 3 inches.

Sub-adults (4-8 inches): Pellets become the staple. Supplement with chopped earthworms or live blackworms 2-3 times per week.

Adults (8+ inches): Sinking pellets + whole earthworms (Canadian nightcrawlers are the gold standard). The pellets are convenient daily food, earthworms are the protein-rich treat.

For the staple pellet most adult keepers use, see the Hikari Sinking Pellets on our shop page. Earthworms you buy live from a bait shop or culture yourself.

The Daily Routine

Here’s what a typical week looks like for an adult axolotl:

• Monday: 4-6 pellets at room temp
• Tuesday: Skip
• Wednesday: 1 chopped earthworm or 6-8 blackworms
• Thursday: Skip
• Friday: 4-6 pellets
• Saturday: Skip
• Sunday: Skip (or one earthworm if axolotl is begging)

Three feedings, four rest days. Easy to keep up with, easy to skip when you travel.

Feeding Method (Important)

How you feed matters as much as what you feed:

• Use feeding tongs for live or chopped food. Drop pellets in directly. Never use your fingers — axolotls have terrible eyesight and will bite anything that moves.
• Drop food directly in front of the nose, not at the back of the tank. Axolotls hunt by smell and proximity, not vision.
• Wait 15-20 minutes, then siphon out any uneaten food. Don’t leave food to rot.
• Do not handle the axolotl during feeding. Stress kills appetite for days.

If your axolotl refuses food in front of you, just leave the room for an hour and check back. They often eat in private.

What Causes a Sudden Loss of Appetite

If your axolotl was eating fine and suddenly stopped, work down this checklist in order:

1. Water temperature — anything above 70°F kills appetite. Get a thermometer in the tank now.
2. Ammonia and nitrite — both should be 0 ppm. Spikes from overfeeding or interrupted cycle stop eating cold.
3. Recent tank change — new substrate, new decor, new tank entirely all reset appetite for 3-7 days.
4. Impaction — gravel ingestion, oversized food, or chronic overfeeding can cause blockage. Look for swollen belly with no recent meals.
5. Illness — fungus, slime coat damage, or parasites. Look for visible white patches, mucus excess, or sores.

The first two cover 90% of “won’t eat” cases. Test the water before assuming anything else.

When to Stop Feeding Temporarily

A few times in an axolotl’s life you actively stop feeding:

• 3 days before transport — empty stomach reduces stress and mess
• 24 hours before a tub treatment — same reason
• 2-3 days after impaction signs — let the digestive tract clear
• 5-7 days during fungal salt baths — appetite returns when treatment ends
• Above 72°F water — appetite drops anyway, don’t push food

Fasting an adult for a week causes zero harm. Forced feeding when stressed causes real harm. Patience beats pressure every time.

The Bottom Line

For 90% of keepers with adult axolotls, the rule is just: feed twice a week, watch the belly, skip if anything looks off. That’s it. Axolotls evolved to eat opportunistically in cold lakes — they’re built for famine, not abundance.

If you’re still in the setup phase, the complete tank setup guide walks through the cycling timeline you need to finish before any axolotl arrives. Don’t buy the axolotl first.

And once you’ve nailed the schedule, the next decision is what specific foods to use. The food safety database ranks every common option from staple to toxic.