| Family: |
Gasterosteidae (Sticklebacks and tubesnouts) |
| Max. size: |
5.5 cm SL (male/unsexed) |
| Environment: |
benthopelagic; freshwater |
| Distribution: |
Europe: Iceland. Some populations in Norway and northern Finland with low scute number possibly refer to this species. |
| Diagnosis: |
Distinguished uniquely from congeners in Europe by having a deep notch on the anterior margin of pelvic girdle. Differs further from other members of the genus by having the following combination of characters: trunk with 2-15 scutes; and scutes forming a lateral keel on caudal peduncle or keel absent. Morphological differences are reported in several lakes between individuals occurring in different substrates (mud, lava), especially in Lake Thingvalla (Ref. 59043). |
| Biology: |
Adults inhabit streams and lakes (Ref. 59043). Males build, guard and aerate the nest where the eggs are deposited (Ref. 205). |
| IUCN Red List Status: |
Least Concern (LC); Date assessed: 01 January 2008 Ref. (130435)
|
| Threat to humans: |
harmless |
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