TankMatesTankMates
  • Explore
  • Encyclopedia
  • Identifier
  • Tank Planner
  • Tank Mates
  • Games
  • World Map
Sign in
ExploreSpeciesIdentifierPlanner
TankMatesTankMatesFind fish that get along. Plan your tank. See real local prices.© 2026 TankMates · hello@tankmates.io
EncyclopediaFish identifierTank MatesCompareAsk FinnTank PlannerTank templatesPlantsCare libraryBreedingPond FishGamesWorld MapDesign StudioCommunityShops & servicesMy profileNotificationsPremiumPrivacyTermsPicture credits
Breeding / Frogs, newts and turtles
Picture coming
Frogs, newts and turtles · Hard

Breeding the sword-tailed newt

Breeds in the cool, wet season: in the wild from about October-November to June, in captivity mostly October-June after an 8-week winter cool-down. Eggs are laid singly over several weeks, folded into or stuck to water plants; larvae metamorphose in about 3 months.

Full species page

Step by step

Pairing

Group of 4-6.

Breeding tank

Cool aquarium with plants and a land ramp.

What starts it

Winter cooling and spring warming.

Eggs and young

Up to about 60 eggs per female per season, laid singly (keeper report; no published count).

Raising the fry

Larvae eat daphnia and baby brine shrimp.

Common mistakes
  • Warm summers
  • Poor filtration
  • Wild-caught stock
Setup blueprint

Home setup

One breeding tank for the sword-tailed newt, drawn to scale from the breeding guide.

90 cm long · 20 cm deep25 cm1234
  1. 1
    Breeding tank: 54 L · about 90 × 20 × 25 cm, the guide gives no size, so this is the smallest tank for this species
  2. 2
    Sponge filter and air pump · gentle and safe for eggs and fry
  3. 3
    Plants for cover · named in the guide
  4. 4
    Land area · named in the guide

Water: 12–24 °C

A plan from the breeding guide and an adult size of 15 cm. Tank shape is a standard 2 : 1 : 1.2 box, at least 6 adult lengths long. Check each step in the guide above.

Setup blueprint

Business setup

A 120 cm rack for breeding the sword-tailed newt in numbers.

1223120 cm rack, 3 shelves
  1. 1
    1 breeding tank, 54 L · about 90 × 20 × 25 cm, set up like the home tank
  2. 2
    2 grow-out tanks, 108 L each · about 90 × 30 × 40 cm; twice the breeding tank, never smaller than this species' smallest tank
  3. 3
    Shared air pump and air line · one line along each shelf feeds a sponge filter in every tank

In total: 3 tanks, about 270 L of water. A litre of water weighs about 1 kg, so check that the floor and rack can take the weight.

Sizes are worked out from the breeding tank in the guide. Tanks fit a standard 120 cm rack when they can; bigger tanks go on their own stands.

Male or female

Females have a tail clearly longer than the body; the male's tail is about body length or shorter, and his cloaca is enlarged, especially in the breeding season. Males lack the tail filament and blue colour of other Cynops; Amami males may show a whitish sheen on the tail.

Can I breed it in my tank?

  • Hard: for experienced breeders.

Day-by-day plan

Typical for frogs, newts and turtles

  1. Day 0Eggs

    Needs a special setup. Read the species guide first.

A general guide for this breeding type. Days change with temperature and species.

Simulator: guided

Stage 1 of 1Eggs

Needs a special setup. Read the species guide first.

Simulator: try it yourself

Set up a virtual breeding tank and see what would likely happen.

No spawning
  • Without live or frozen food the parents aren't in breeding condition.

An educational estimate from the breeding rules, not a promise.