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🌊 Marine Data Deficient 🐠 Aquarium 🌡️ Tropical

Blackdwarf shrimpgoby

Cryptocentrus nanus Greenfield & Allen, 2018
Max Length
2.2 cm
Max Weight
-
Lifespan
-
Trophic Level
3.1
Depth
8–11 m
Climate
Tropical
Resilience
High
Vulnerability
10.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Inhabitsf sand bottoms in 8.2-10.7 m depth and partners with an alpheid-shrimp which remains unidentified (deposited specimen CAS 244344). Adults mature at 2.34 cm SL or less .

Scientific Name
Cryptocentrus nanus
Authority
Greenfield & Allen, 2018
Habitat
Marine
Climate
Tropical
IUCN Status
DD
Max Length
2.2 cm
Depth Range
8–11 m
Trophic Level
3.1
Resilience
High
Vulnerability
10.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 5; Dorsal soft rays (total): 10; Anal spines: 1; Anal soft rays: 8 - 9. This species is distinguished by the following characters: D IV-I,10; A I,8-9; pectoral-fin rays 16; scales in longitudinal series 65-81; predorsal scales 0-15; anterior scales cycloid, posterior scales ctenoid; anterior part of breast, prepelvic region, and pectoral-fin base are naked; head naked except on the side of nape and predorsal region, where scales extend anteriorly to about level of middle of operculum; body depth at pelvic-fin origin 4.4-5.2, mean 4.8; vomerine teeth present; gill opening extending forward to a vertical at posterior edge of preoperculum or slightly anterior; dorsal-fin spines progressively longer to fourth, longest 1.6-2.7 in HL; caudal fin rounded, 2.7-3.1 in HL; pectoral fins reaching level of anus or just beyond (3.7-4.7 in SL); pelvic fins reaching posteriorly to anus (3.6-4.3 in SL). Colouration: live individuals are black, fins are black with clear distal margins .Cross section: oval.

🌀 Behaviour

Behavioural data for Blackdwarf shrimpgoby is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous 📦 Batch Spawner
Spawning Season
spring-summer
Spawn Location
Pelagic
Fertilization
External

🌍 Habitat & Distribution

Marine; benthopelagic; depth range 8 - 11 m . Tropical Central Pacific: Fiji and possibly Palau.

🌿 Ecology

Zone Preferences
🌊 Marine
Trophic Level
3.1±0.3

📐 Morphometrics

Length–Weight Relationship: W = 0.00741 × L3.09 (TL)
Max TL
2.2cm
Dorsal Spines
5
Dorsal Rays
10
Anal Spines
1
Anal Rays
9

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Data Deficient
Assessment Date
2023

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.1
Predator
Climate Zone
Tropical
Described By
Greenfield & Allen, 2018

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