Mordacia mordax  (Richardson, 1846)

Australian lamprey
Add your observation in Fish Watcher
| Native range | All suitable habitat | PointMap | Year 2100 |
This map was computer-generated and has not yet been reviewed.
Mordacia mordax   AquaMaps   Data sources: GBIF OBIS
Upload your photos and videos
Pictures | Google image
Image of Mordacia mordax (Australian lamprey)
Mordacia mordax
Picture by Günther, A.C.L.G.

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Cephalaspidomorphi (lampreys) > Petromyzontiformes (Lampreys) > Mordaciidae (Southern topeyed lampreys)
Etymology: Mordacia: Latin, mordax, -acis = someone that bites.

Environment / Climate / Range Ecology

Marine; freshwater; brackish; demersal; anadromous (Ref. 51243).   Temperate; 35°S - 44°S (Ref. 26213)

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 50.0 cm TL male/unsexed; (Ref. 5259); common length : 37.5 cm TL male/unsexed; (Ref. 5259)

Short description Morphology | Morphometrics

Adults: 11.3-43.2 cm TL; body proportions of pre-spawning specimens, as percentage of TL (based on 125 prespawning specimens measuring 11.3-42.1 cm TL): 8.5-11.3 prebranchial length, 7.1-9.8 branchial length, 60.4-68.3 trunk length, 14.4-20.1 tail length, 1.1-1.7 eye length and 4.9-6.6 disc length. Body proportions of spawning male specimens, as percentage of TL (based on 8 spawning males measuring 27.7-37.6 cm TL): 11.4-16.6 prebranchial length, 8.8-10.1 branchial length, 60.1-65.3 trunk length, 13.3-15.7 tail length, 8.1-11.2 disc length. Mature males with some loose skin in gular region. Urogenital papilla not prominent in mature adults; trunk myomeres, 84-96. Adult dentition: 2 triangular supraoral laminae each with 3 unicuspid teeth, 1 per apex; infraoral lamina, 7-9 unicuspid teeth of various size (these teeth become greatly enlarged with sexual maturation); 5-7 endolateral plates on either side each bearing 2-3 unicuspid teeth, usually 3; endolateral formula, typically 2-3-3-3-3-3 in immature individuals and 5-7 individual cusps on either side in mature individuals; 1 row of anterials; first row of anterials, 2 unicuspid teeth plus 1-2 bicuspid teeth or 3 unicuspid teeth flanked on either side by 1 bicuspid tooth; 1 row of exolaterals on each side; 1 row of posterials; first row of posterials, 12-14 posterial plates, the 2-4 lateralmost tricuspid and the internal ones bicuspid in immature individuals and 12-14 unicuspid teeth in mature individuals; transverse lingual lamina w-shaped, with 29 unicuspid teeth, the median one and the 2 subterminal ones slightly enlarged; longitudinal lingual laminae interrupted j-shaped, each with an undetermined number of unicuspid teeth. Velar tentacles in adults, 3-4, smooth. Body coloration (live) of immature adults brownish gray on dorsal surface and silvery on ventral surface; lateral line neuromasts darkly pigmented; caudal fin pigmentation, 25% to <75% coverage; caudal fin shape, spade-like; oral papillae, 25-45 (Ref. 89241).

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Southern Ocean: Southeastern Australia from Shoalhaven River, New South Wales to Gulf of St. Vincent, South Australia.

Biology     Glossary (e.g. epibenthic)

Adults inhabit the sea for an undetermined period and are parasitic on fishes; enter freshwater to breed. Majority of adulthood is spent in estuaries or at sea. Upstream spawning migrants occur in fast-flowing sections of rivers with a mud, sand or silt substrate, sometimes seen congregated below barriers to upstream movement such as weirs. Ammocoetes live in slow-flowing streams, burrowed in mud or silt. Common length is 35-40 cm (Ref. 44894). Larval life is 3.5 yrs. During the spawning migration, adults burrow in the substrate of rivers during the day and migrate upstream during the night. Fecundity, 3,789-13,372 eggs/female. De Castelnau (1872) states that the adults from the lower Yarra River, Victoria, are considered good food (Ref. 89241).

Main reference Upload your references | References | Coordinator | Collaborators

Allen, G.R., 1989. Freshwater fishes of Australia. T.F.H. Publications, Inc., Neptune City, New Jersey. (Ref. 5259)

IUCN Red List Status (Ref. 90363)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

FAO(Publication : search) | FisheriesWiki | Sea Around Us

More information

Countries
FAO areas
Ecosystems
Occurrences
Introductions
Stocks
Ecology
Diet
Food items
Food consumption
Ration
Common names
Synonyms
Metabolism
Predators
Ecotoxicology
Reproduction
Maturity
Spawning
Fecundity
Eggs
Egg development
Age/Size
Growth
Length-weight
Length-length
Length-frequencies
Morphometrics
Morphology
Larvae
Larval dynamics
Recruitment
Abundance
References
Aquaculture
Aquaculture profile
Strains
Genetics
Allele frequencies
Heritability
Diseases
Processing
Mass conversion
Collaborators
Pictures
Stamps, Coins
Sounds
Ciguatera
Speed
Swim. type
Gill area
Otoliths
Brains
Vision

Tools

Special reports

Download XML

Internet sources

BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | iSpecies | PubMed | Scirus | SeaLifeBase | Tree of Life | uBio | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.7500   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00102 (0.00046 - 0.00225), b=3.06 (2.88 - 3.24), based on all LWR estimates for this body shape (Ref. 93245).
Trophic Level (Ref. 69278):  4.4   ±0.8 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278):  .
Vulnerability (Ref. 59153):  Moderate vulnerability (41 of 100) .
Price category (Ref. 80766):   Unknown.