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Praealticus margaritatus (Kendall & Radcliffe, 1912)

Pearly rockskipper
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Image of Praealticus margaritatus (Pearly rockskipper)
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drawing shows typical species in Blenniidae.

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Blenniiformes (Blennies) > Blenniidae (Combtooth blennies) > Salariinae
Etymology: Praealticus: Latin, prae = in front of + Latin, altus, alticus = nutritious.

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; pelagic-neritic. Tropical

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

Western Central Pacific: American Samoa and Fiji.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 7.3 cm SL male/unsexed; (Ref. 54980)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 12 - 13; Dorsal soft rays (total): 17 - 19; Anal spines: 2; Anal soft rays: 18 - 21. Upper lip edge generally partly crenulate; color note from description: females warm brown, paler on belly; head with a slight purplish tinge, darker on snout and lips; only a slight trace of crossbars; body with small, pale pearly spots, most numerous posteriorly; crest dark brown, thickly dotted with small pearly or bluish spots; pectorals dark brown; spinous dorsal fin dark brown with a series of large, oblique, oblong black spots, 1 on each membrane; second dorsal fin dark brown with numerous narrow, pale oblique streaks; caudal fin dark brown, appearing almost black; anal fin dark brown with darker margin; pelvic fins black. Males paler with pearly spots more distinct and more numerous anteriorly; head covered with small dusky spots; crest without white spots; large black spots only on first 2 membranes of dorsal fin. Anal soft rays rarely 18 or 21; segmented caudal rays 13-14 (typically 14) with middle 3-9 branched; lateral line pores 1-6 (Ref. 54980).

Biology     Glossary (e.g. epibenthic)

Facultative air-breathing (Ref. 126274); Oviparous. Eggs are demersal and adhesive (Ref. 205), and are attached to the substrate via a filamentous, adhesive pad or pedestal (Ref. 94114). Larvae are planktonic, often found in shallow, coastal waters (Ref. 94114).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Oviparous, distinct pairing (Ref. 205).

Main reference Upload your references | References | Coordinator : Williams, Jeffrey T. | Collaborators

Springer, V.G., J.T. Williams and T.M. Orrell, 1991. Catalog of type specimens of recent fishes in the National Museum of Natural History, Smithsonian Institution, 2: Blenniidae. Smithson. Contrib. Zool. 519:28. (Ref. 10697)

IUCN Red List Status (Ref. 130435: Version 2024-1)

  Least Concern (LC) ; Date assessed: 27 March 2009

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

FAO - Publication: search | FishSource |

More information

Trophic ecology
Food items
Diet composition
Food consumption
Food rations
Predators
Ecology
Ecology
Population dynamics
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Recruitment
Abundance
Life cycle
Reproduction
Maturity
Maturity/Gills rel.
Fecundity
Spawning
Spawning aggregations
Eggs
Egg development
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Distribution
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Anatomy
Gill area
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Otolith
Physiology
Body composition
Nutrients
Oxygen consumption
Swimming type
Swimming speed
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)
Genetics
Genetics
Heterozygosity
Heritability
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Aquaculture profiles
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Stamps, coins, misc.
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Taxonomy
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Synonyms
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References

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Internet sources

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoological Record

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5001   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00776 (0.00356 - 0.01695), b=3.00 (2.81 - 3.19), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (Ref. 69278):  2.0   ±0.00 se; based on food items.
Resilience (Ref. 120179):  High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).