Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on...
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![Page 1: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/1.jpg)
Family Gerreidae (Mojarras)
● Gerreid fishes are minor commercial fish in
Thai waters
● occur on reef-associated; brackish; marine
Gerres erythrourus
![Page 2: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/2.jpg)
- The body is moderate deep, have 23-25 myomeres. The gut is coiled and short. A small, inconspicuous gas bladder is present above the anterior portion of the gut. The moderate head is broad and round, large mouse with it’s long ascending premaxillary process. The snout is short and round. The mouth initially reaches to anterior of eye, but in postflexion larvae be comes larger. The eye round is large in preflexion larvae and moderate to large. There is gap between the vent and anal fin. • Pigmentation:- Gerreid larvae have distinctive pigmentation from along the anal fin base to the tip of notochord
General Characteristic of Gerreid larvae
![Page 3: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/3.jpg)
Meristic Characters of Indo-Pacific gerreid genera
D A P1 P2 C VertebraeGerres
Pentaprion
IX-X,9-11 III,7-10 15-17 I,5 9+8 10+14= 24
IX-X,12-14 V-VI,12-14 12-15 I,5 9+8 10+14= 24
Head Spination: - Gerreid larvae have small preopercular spine
![Page 4: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/4.jpg)
● Family: Gerreidae● Stage: Preflexion● Sampling Location: Western Gulf of Thailand● Sampling Gear: Bongo net
● Measurement: (mm)
BL = 3.30 HL= 0.90 ED= 0.40SnL= 0.35 PAL= 1.50 BD= 1.00
● Counts:
D: - A: - P1: -
P2: - C: - Myomeres: 24
Sample measurement and identification
![Page 5: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/5.jpg)
- The body is moderate deep, gut coiled and short- The moderate head is broad and round, large mouse with it’s long ascending premaxillary process (protractile mouth)- The eye round is large- There is gap between the vent and anal fin • Pigmentation:-Gerres sp. larvae have distinctive pigmentation from along the anal fin base to the tip of notochord
•Morphology:
gap
![Page 6: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/6.jpg)
● Head Spination: - 1 small preopercular spine
● Similar family: Nemipteridae and Sparidae
![Page 7: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/7.jpg)
● Family: Gerreidae● Stage: Post flexion● Sampling Location: Western Gulf of Thailand ● Sampling Gear: Bongo net● Species Name: Gerres sp.● Measurement: (mm)
BL = 6.40 HL= 1.50 ED= 0.60SnL= 0.50 PAL= 2.30 BD= 1.30
● Counts:
D: IX, 9 A: III, 6 P1: 10
P2: - C: 9+8 Myomeres: 24
Sample measurement and identification
![Page 8: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/8.jpg)
- The body is moderate deep, gut coiled and short- The moderate head is broad and round, protractile mouth- There is gap between the vent and anal fin • Pigmentation:-Gerres sp. Larvae have distinctive pigmentation from along the anal fin base, anterior of anus, posterior of hypural bone and midbrain• Head Spination: small preopercular spine
•Morphology:
![Page 9: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/9.jpg)
● Similar family: Gerreid larvae similar family Nemipteridae and
Sparidae, but small preopercular spine, protractile mouth, the gap between vent to anal fin and pigment pattern on the ventral margin of tail are usefully for distinctive from others family
![Page 10: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/10.jpg)
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Family Serranidae
● Serranid fishes are commercial fish in Thai waters and South China Sea
● demersal fish; non-migratory
● occur on reef-associated; brackish; marine
E. sexfasciatus
E. malabaricus
E. tauvina
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- The body is moderate deep, have 24 myomeres. The gut is loosely coiled. A small gas bladder is located above the apex of the gut. The head is initially moderate but increases in relative size to large. The snout is about equal to eye diameter. The large mouth is moderate oblique. The round eye is small to moderate. The spine at the preopercular angle is large than the others. • Pigmentation:- Serranid larvae are lightly to moderately pigment.
General Characteristic of Serranid larvae
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Meristic Characters of some Indo-Pacific serranid genera
D A P1 P2 C Vertebrae
Anthiinae
Caprodon
Giganthias
Holanthias
etal.
Epinephelinae
Epinephelus
Cephalopholis
etal.
X,19-21 III,7-8 16-18 I,5 9+8 (15) 26-27
IX,13 III,8 16 I,5 - 10+15= 25
X,13-19 III,7-8 16-19 I,5 (13) 9+17= 26
XI,12-19 III,7-10 15-20 I,5 9+8 10+14= 24
IX,13-17 III,7-10 15-20 I,5 9+8 10+14= 24
![Page 14: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/14.jpg)
● Family: Serranidae● Subfamily: Epinephelinae● Stage: Flexion● Species Name: -● Sampling Location: Celebes Sea (Indonesia)● Sampling Gear: Bongo net
● Measurement: (mm)
BL = 4.50 HL= 1.80 ED= 0.50SnL= 0.70 PAL= 2.60 BD= 1.50
● Counts:D: III A: - P1: -
P2: I C: 9+8 Myomeres: 24
Sample measurement and identification
![Page 15: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/15.jpg)
- The body is moderate deep- The lightly coiled gut
extends to about mid of body- The head is moderate and snout is short and blunt- The spine serially associated with the first dorsal fin stout, elongate and serrate- The pelvic fin spine elongate and serrate, pelvic ray much shorter than the spine
Subfamily:EpinephelinaeGenus:Epinephelus sp.
• Morphology:
Serrated spine
Serrated spine
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● Pigmentation:- Epinephelus sp. have melanophores over the gut and on caudal peduncle● Head Spination:-enlarged and serrate spine is present at the angle of preopercle and supraorbital ridge is present
Serrate preopercular spine
Supraorbital ridge
![Page 17: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/17.jpg)
● Family: Serranidae● Subfamily: Epinephelinae● Species Name: Epinephelus sp.● Stage: Post flexion● Sampling Location: Western Gulf of Thailand ● Sampling Gear: Bongo net
● Measurement: (mm)
BL = 6.50 HL= 2.20 ED= 0.70SnL= 0.80 PAL= 3.80 BD= 2.30
● Counts:D: X, 15 A: III, 10 P1: 15
P2: I, 5 C: - Myomeres: 24
![Page 18: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/18.jpg)
- The body is moderate deep- The spine serially associated with the first dorsal fin and pelvic fin stout, elongate and hook-like serration pattern
Subfamily:EpinephelinaeGenus:Epinephelus sp.
• Morphology:
Hook-like serrated spine
![Page 19: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/19.jpg)
● Pigmentation: Epinephelus sp. Have melanophore over the gut and on caudal peduncle● Head Spination:- enlarged and serrate spine is present at the angle of preopercle and have supraorbital ridge, small spine on the posttemporal and supracleithral
Supracleithral spinePosttemporal spine
Serrate preopercular spine
![Page 20: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/20.jpg)
● Family: Serranidae● Subfamily: Anthiinae● Species Name: -● Stage: Post flexion● Sampling Location: Andaman Sea ● Sampling Gear: Bongo net
● Measurement: (mm)
BL = 4.80 HL= 2.00 ED= 0.70SnL= 0.60 PAL= 3.20 BD= 2.20
● Counts:D: X, 14 A: III, 8 P1: 15 ?
P2: I, 5 C: 9+8 Myomeres: 26
![Page 21: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/21.jpg)
- The body is deep
and hunchbacked body - The gut is coiled - The head is very large, short and moderately slope snout, large mouth and reaches beyond the middle of the eye, the eye is round and large • Pigmentation:-Anthiinae larvae are not heavily pigmented and except for the midbrain, dorsal midlateral line and ventral edge of tail
Subfamily:AnthiinaeGenus: -
•Morphology:
![Page 22: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/22.jpg)
● Head Spination:- Head spination is extensive, interopercular spine is large and serrate at the preopercular angle- A moderate supracleithral spine, and two small posttemporal spines, and supraorbital ridge
Supracleithral spinePosttemporal spine
Subopercular spine
Interopercular spine
Supraorbital ridge
![Page 23: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/23.jpg)
● Similar family: Serranid larvae are similar family Lutjanidae,
but dorsal and anal spine, head spination and pigment pattern on the ventral margin of tail are usefully for distinctive from this family
![Page 24: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/24.jpg)
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Family Sillaginidae (Whitings)
● Sillaginid fishes are commercial fish in Thai waters and South China Sea
● demersal fish; non-migratory
● occur on sand and muddy substrates in the mouths of rivers, estuaries, and mangrove creeks in deep range 1 – 50 m.
s. maculata s. sihama
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- The body is elongate, have 32 myomeres. The gut is initially straight, begins to coil during notochord fleaxion, lack of gas bladder. The head is small to moderate. the mouth initially reaches to about the anterior margin of the eye. The eye is large to moderate. Head spination is poorly developed. • Pigmentation:- Sillaginid larvae are lightly pigmented and characterized by a single low of melanophores along the ventral midline of the trunk, tail, and often on the head.
General Characteristic of Sillaginid larvae
![Page 27: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/27.jpg)
Meristic Characters of Indo-Pacific sillaginid genera
D A P1 P2 C Vertebrae
Sillaginopsis
Sillago
X+I, 25-27 II, 24-27 20-22 I,5 9+8 15+27= 42
X-XIII+I, 16-24 II, 14-24 14-17 I,5 9+8 32-40
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● Family: Sillaginidae● Species Name: Sillago sp.● Stage: Post flexion● Sampling Location: Phang-Nga Bay● Sampling Gear: Bongo net
● Measurement: (mm)
BL = 6.60 HL= 1.70 ED= 0.55SnL= 0.45 PAL= 3.50 BD= 1.15
● Counts:D: XII + I, 21 A: II, 18 P1: 14
P2: I, 5 C: 9+8 Myomeres: 40
Sample measurement and identification
![Page 29: Family Gerreidae (Mojarras) ● Gerreid fishes are minor commercial fish in Thai waters ● occur on reef-associated; brackish; marine Gerres erythrourus.](https://reader036.fdocuments.net/reader036/viewer/2022062315/5697c0251a28abf838cd5351/html5/thumbnails/29.jpg)
● Morphology:- elongate body- The gut is initially straight, and
lake of gas bladder- The head is small, mouth reach to
anterior margin of the eye
- The eye is moderate
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● Pigmentation:- Sillago sp. are lightly pigmented; single
row of melanophores along the ventral midline of the trunk and tail; series of melanophores at mid-laterally and dorsal edge of the tail
- pigment is often present on the margin of tail
● Head Spination: -
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