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#2375 · 🐟 fish

Siamese Fighting Fish

🇳🇱 Siamese kempvis ·Betta splendens

VUvulnerable 🐟 Fish 📍 outside Europe
Siamese Fighting Fish, photo 1 of 10
1/10 © muangpaisuetrong · CC BY-NC 4.0

what is it?

The Siamese fighting fish ( Betta splendens ), also known as the betta , is a popular fish in the aquarium trade. Bettas are a member of the gourami family and are known to be highly territorial. Males in particular are prone to high levels of aggression and will attack each other if housed in the same tank. If there is no means of escape, this will usually result in the death of one or both of the fish....

base stats

  • NL sightings 0iNaturalist, research grade
  • worldwide 3,733iNaturalist observations
  • threat VUvulnerable

Bars compare against all animals on log scales: up to 300,000 Dutch and 600,000 worldwide sightings (the most-seen species), 150 t (blue whale), 30 m and 400 years (Greenland shark).

fun facts

  • No confirmed wild sightings in the Netherlands on iNaturalist: you'd have to travel for this one.
  • 3,733 observations worldwide on iNaturalist.
  • Scientifically named by Charles Tate Regan in 1910 (116 years ago).
  • Listed as Vulnerable on the IUCN Red List.

fact sheet

English
Siamese Fighting Fish
Nederlands
Siamese kempvis
scientific name
Betta splendens
class
Actinopterygii
order
Anabantiformes
family
Osphronemidae
IUCN Red List
VU · vulnerable
sightings in NL
0
sightings worldwide
3,733
GBIF records in NL
0
weight
—
length
—
lifespan
—
named
1910 by Charles Tate Regan

IUCN in Dutch: kwetsbaar. Blank means the sources don't say.

Sources: iNaturalist taxon 95748, Wikidata Q549, GBIF 2393998, Wikipedia (EN), Wikipedia (NL). Intro text from Wikipedia (CC BY-SA 4.0).Updated 2026-10-24.

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