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🌊 Marine Least Concern 🌡️ Tropical

Sand wrasse

Ammolabrus dicrus Randall & Carlson, 1997
Max Length
9.4 cm
Max Weight
-
Lifespan
-
Trophic Level
3.3
Depth
7–18 m
Climate
Tropical
Resilience
High
Vulnerability
17.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Adults are found over open sand bottom, in small, swift-swimming schools . Feed on zooplankton above the substratum . Oviparous, distinct pairing during breeding .

Scientific Name
Ammolabrus dicrus
Authority
Randall & Carlson, 1997
Habitat
Marine
Climate
Tropical
Body Shape
Elongated
IUCN Status
LC
Max Length
9.4 cm
Depth Range
7–18 m
Trophic Level
3.3
Resilience
High
Vulnerability
17.00/100
Salinity
30–40 ppt

🔬 Taxonomy

Genus
Ammolabrus
Ammolabrus
Species
Sand wrasse
Ammolabrus dicrus

🐟 Physical Description

Dorsal spines (total): 9; Dorsal soft rays (total): 12; Anal spines: 3; Anal soft rays: 12; Vertebrae: 25. Flexible anal fin spines; 19 or 20 + 5 or 6 pored lateral line scales with single horizontal tubule, ending in a pore; scales thin and rhomboidal, those of thorax and anterior abdomen smaller than those of side of body; head naked except for 2 small scales dorsally on opercle and diagonal row of 5 partially embedded scales behind eye; no median predorsal scales; 3 small median prepelvic scales; anterior third of prepelvic region naked; branchiostegal rays 6; upper jaw strongly protrusible, median process of premaxilla extending to above anterior pupil edge; body moderately elongate, the depth 4.2-4.45 in SL; dorsal part of head from front of snout to origin of dorsal fin with a fleshy median ridge, the interorbital space high and triangular when viewed from the front; interorbital space narrowest anteriorly; caudal fin small, 1.45-1.65 in head length; pelvic fins small, 2.2-3.05 in head length .: elongated.

🌀 Behaviour

Behavioural data for Sand wrasse is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous

Oviparous, distinct pairing during breeding .

🌍 Habitat & Distribution

Marine; benthopelagic; depth range 7 - 18 m . Tropical Central Pacific: known only from O'ahu, Hawaiian Islands.

🌿 Ecology

Zone Preferences
🌊 Marine
Trophic Level
3.3±0.5
🐠 Schooling
Food Items

zooplankton above the substratum (Ref

📐 Morphometrics

Length–Weight Relationship: W = 0.00676 × L3.05 (TL)
Max TL
9.4cm
Dorsal Spines
9
Dorsal Rays
12
Anal Spines
3
Anal Rays
12
Vertebrae
25

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2008

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
17.00/100
Low vulnerability
Trophic Level
3.3
Predator
Body Shape
Elongated
Climate Zone
Tropical
Described By
Randall & Carlson, 1997

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