Far Eastern brook lamprey
📖 Overview
Freshwater. Occurs in rivers, brooks, ponds, and lakes . Inhabits all types of rivers and streams, including brackish waters and enters floodplain meadows during high waters. Ammocoetes occur in detritus-rich sands or clay sediments . Parasitic; semelparous . Adults nonparasitic . Spawns in shallow water on sand-gravel bottom . Spawning period in Japan is from mid to late May. Fecundity, 495-2,942 eggs/female in Japan, with the long diameter of eggs varying from 0.98 to 1.37 mm and the short diameter from 0.86 to 1.25 mm .
🔬 Taxonomy
🐟 Physical Description
Body dark brown on back and white on belly; 7 external gill openings behind eyes; single nostril opening in front of both eyes; myotomes from last gill aperture to origin of anal fin 58-64 . Diagnostic features of adults: 11.1-20.2 cm TL. Body proportions, as percentage of TL (based on 19 specimens measuring 11.6-17.2 cm TL): prebranchial length, 10.3-12.3; branchial length, 9.5-13.3; trunk length, 46.0-54.2; tail length, 25.0-31.6; eye length, 1.2-2.4; disc length, 4.7-6.4. Urogenital papilla length, as a percentage of branchial length, in three spawning males measuring 14.3-15.4 cm TL, 16.4-67.8 (based on 21 spawning males 11.1-15.4 cm TL). Trunk myomeres, 57-65. Dentition: supraoral lamina, 2 unicuspid teeth; infraoral lamina, 6-11 unicuspid teeth; 3 endolaterals on each side; endolateral formula, typically 2-2-2; 1-2 rows of anterials; first row of anterials, 4-5 unicuspid teeth; total number of anterials, 38-44 unicuspid teeth; usually one exolateral present on one or both sides, exceptionally, one complete row of exolaterals on each side; single row of posterials consisting of 19-27 unicuspid teeth; transverse lingual lamina, 13 unicuspid teeth, the median one greatly enlarged; longitudinal lingual laminae each with 7-8 unicuspid teeth. Velar tentacles, 7, with tubercles, the median tentacle shorter than the lateral ones immediately next to it. Lateral line neuromasts unpigmented. Gular region unpigmented. Second dorsal fin unpigmented. Extent of caudal fin pigmentation, 1% to
🌀 Behaviour
Behavioural data for Far Eastern brook lamprey is currently being reviewed.
🦐 Diet
Diet information for Far Eastern brook lamprey is currently being compiled.
🥚 Reproduction
🌍 Habitat & Distribution
Freshwater; demersal. Temperate Pacific Ocean drainages: In Europe in Umbra (Kola Peninsula), Severnaya Dvina, Mezen and upper Pechora drainages.
🌿 Ecology
📐 Morphometrics
🌡️ Water Parameters & Tolerance
🛡️ Conservation Assessment
📊 Population Risk & Fisheries
🌐 Names & Taxonomy
| Language | Common Names |
|---|---|
| 🇬🇧English | Far Eastern brook lamprey · Siberian Lamprey |
| 🇫🇷French | lamproie de ruisseau de l'Extrême-Orient |
| 🇯🇵Japanese | Shiberiayatsume · シベリアヤツメ |
| 🇨🇳Chinese | 雷氏七鳃鳗 |
Scientific Synonyms
| Scientific Name | Author | Year | Status |
|---|---|---|---|
| Entosphenus reissneri | Dybowski | 1869 | Synonym |
| Lampetra mitsukurii | Hatta | 1901 | Synonym |
| Lampetra mitsukurii minor | Hatta | 1911 | Synonym |
| Lampetra reissneri | Dybowski | 1869 | Synonym |
| Lethenteron mitsukurii | Hatta | 1901 | Synonym |
| Petromyzon reissneri | Dybowski | 1869 | Synonym |
🔍 Similar Species
🗺️ Global Occurrence Map
Occurrence records from the Global Biodiversity Information Facility (GBIF) - 16 records indexed .
👥 Community & Contribute
No observations yet - be the first to log one!
View all observations for Far Eastern brook lamprey ↗Spotted incorrect or outdated data? Submit a correction and our editorial team will review it. Approved edits go live within 48 hours.
Found a factual error, broken data, or inappropriate content? Let us know and we will investigate promptly.