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Araneidae

Spiny orb-weaver (Gasteracantha)

Gasteracantha spp. (e.g. G. kuhli)
IntermediateDiurnal · active nowHuman-verified sheet
14:00
Day

Drag the sun. Spiny orb-weaver (Gasteracantha) is diurnal, so what it is doing changes with the light.

Temperature

25–32°Ambient

One ambient band, 25–32°C. This sheet states no warm side, no cool side and no night figure, so none are shown.

Humidity

65–80%Target RH
Check your setup against this sheet
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The numbers

Enclosure
30 × 30 × 30 cm
Diet
Small flying insects — fruit flies, house flies, small crickets · 2-3 small insects weekly
Temperature
25-32°C
Humidity
65-80%

Identity

Order / Family
Araneae
IUCN / CITES
Not CITES-listed; IUCN not assessed
Difficulty
Intermediate
Commonality
Very common Thai native (wild); rarely deliberately kept
Adult size
Female body ~0.6-1 cm wide, hard spiny 'crab-like' abdomen
Lifespan
Female ~1 year (annual)
Growth rate
Fast
Activity & niche
Diurnal orb-web ambusher in vegetation
Temperament
Docile, sedentary in web
Venom / defense
Mild venom, not medically significant; harmless — spines are not a sting

Enclosure and conditions

Temperature
25-32°C
Humidity
65-80%
Min. enclosure
Mesh/screen cage ~30x30x30 cm for web
Substrate
Thin coco base; open frame for web
Hides / decor / water
Branches/plants for orb web; misting for water

Diet

Staple food
Small flying insects — fruit flies, house flies, small crickets
Feeding frequency
2-3 small insects weekly
Supplements
Not required

Behaviour and handling

Handling
Not handled; harmless but disrupts web; observe
Communal
Solitary webs, but many can share a hedge
Defense / stress signs
Drops on dragline, vibrates web

Reproduction

Reproduction
Oviparous — small egg sac attached to vegetation; not live-bearing

Common health problems

Common health issues
SignsShort annual lifespan; dehydration
Red flags / quarantine
SignsWild adults near end of life; QT wild-caught; big enough web frame

Good to know

  • The hard, colourful spiny abdomen makes it look like a tiny crab — the spines deter bird predators

Others in this group

Sources