Actinopterygii (ray-finned fishes) > Scorpaeniformes
(Scorpionfishes and flatheads) > Peristediidae
(Armored searobins or armored gurnards)
Etymology: Heminodus: Greek, hemi = half + Greek, nodos, -ou = without teeth (Ref. 45335). More on author: Smith.
Environment: milieu / climate zone / depth range / distribution range
Marine; bathydemersal; depth range 200 - 500 m (Ref. 9771). Deep-water
Indo-Western Pacific: Philippines, Japan and Indonesia.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 9.0 cm TL male/unsexed; (Ref. 559)
Morphology | Morphometrics
(total): 6 - 8;
soft rays: 18 - 19. This species is characterized by the following: fusiform body covered with bony plates with head large and depressed; broad snout, with short, triangular rostral projection on each side, nearly parallel to each other; interorbital region concave and with no distinct ridges; head with supraocular, parietal, posttemporal, opercular, and preopercular spines; large and inferior mouth with posterior tip of upper jaw reaching point below anterior border of orbit; upper jaw with villiform teeth; no teeth on lower jaw, vomer and palatine; 1-2 short barbels on lip, none on chin; body plates arranged in 4 rows, each plate with single, posteriorly directed spine; plates in upper lateral row lack anteriorly directed spine; anterior 4 (or 5) plates small; lower lateral row of bony plates ending at caudal peduncle and separated from the other side; 4 (or 5) plates along ventral region anterior to anus, with the most anterior largest; dorsal fin origin between first and second bony plates in dorsal row, ending on anterior part of caudal peduncle; anal fin origin just posterior to anus, also terminating on anterior part of caudal peduncle; pectoral fin reaching posteriorly to near anus length; 2 ventralmost pectoral fin rays detached, large and thickened; pelvic fin reach posteriorly to point between origin of dorsal and anus fins; when fresh, colour of head and dorsal part of body pale red, ventral part of body whitish; dorsal part with yellowish-green spots; fins mostly whitish; 2 dusky bands on pectoral fin (Ref. 93670).
Deep benthic species of limited commercial value inhabiting warm tropical seas along continental shelf edge and slope. Bony scutes reduce commercial value (Ref. 9771).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Richards, W.J., 1999. Triglidae. Gurnards, sea robins, armored gurnards, and armored sea robins. p. 2359-2363. In K.E. Carpenter and V.H. Niem (eds.) FAO species identification guide for fishery purposes. The living marine resources of the WCP. Vol. 4. Bony fishes part 2 (Mugilidae to Carangidae). FAO, Rome. (Ref. 9771)
IUCN Red List Status (Ref. 115185)
CITES (Ref. 115941)
Threat to humans
Fisheries: of no interest
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Preferred temperature (Ref. 115969
): 11.1 - 13.7, mean 12.5 (based on 30 cells).
Phylogenetic diversity index (Ref. 82805
= 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00813 (0.00346 - 0.01907), b=3.03 (2.83 - 3.23), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.3 ±0.3 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (19 of 100) .