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Diadromous Least Concern 🌡️ Subtropical

Stiphodon Atropurpureus

Stiphodon atropurpureus Herre, 1927
Max Length
5 cm
Max Weight
-
Lifespan
-
Trophic Level
-
Depth
-
Climate
Subtropical
Resilience
High
Vulnerability
10.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Adults inhabit clear streams and mainly feed on epiphyte and biofilm on rocks in the wild. Due to its possible amphidromous nature, as known to occur with its congeners (adults live and breed in freshwater streams; larvae hatched drift downstream and develop in marine environments; juveniles return to freshwater streams), blockage of the migration pathway (e.g. construction of dam or culvert in streams) would cause a significant impact on this species. Ensuring no net loss of habitat, keeping the natural stream flow and maintaining the stream-ocean corridor are all essential for preserving this species (in reference to its congeners; see Ref. 82682, 82684, 82689, 82690). Collection conducted by aquarium hobbyists (both private and commercial) also poses a serious threat to Stiphodon species in some regions and this kind of activity should be strictly controlled .

Scientific Name
Stiphodon atropurpureus
Authority
Herre, 1927
Habitat
Diadromous
Climate
Subtropical
Body Shape
Elongated
IUCN Status
LC
Max Length
5 cm
Resilience
High
Vulnerability
10.00/100
Migration
Amphidromous
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 7; Dorsal soft rays (total): 9; Anal spines: 1; Anal soft rays: 10. Sexual dimorphism obvious; mature male with body, snout and cheek iridescent green/ blue/ purple (depending on viewing angle and the age and status of the fish); first dorsal fin not elongated/ filamentous, dorsal fins with narrow red margin while female body has white/ pale buff with two obvious transverse stripes .: elongated.

🌀 Behaviour

Behavioural data for Stiphodon Atropurpureus is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous 📦 Batch Spawner
Spawning Season
spring
Spawn Location
Substrate
Fertilization
External

🌍 Habitat & Distribution

Marine; freshwater; brackish; benthopelagic; amphidromous. Subtropical Northwest Pacific: tropical and subtropical; Japan, Taiwan, Malaysia, Philippines and the mainland of South China.

🌿 Ecology

Zone Preferences
🌊 Marine 💧 Freshwater 🌿 Brackish
Migration
Amphidromous
Food Items

epiphyte and biofilm on rocks in the wild

📐 Morphometrics

Length–Weight Relationship: W = 0.00389 × L3.12 (TL)
Max TL
5cm
Dorsal Spines
7
Dorsal Rays
9
Anal Spines
1
Anal Rays
10

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2019

📊 Population Risk & Fisheries

Population Resilience
High
Minimum doubling time
Fishing Vulnerability
10.00/100
Low vulnerability
Body Shape
Elongated
Climate Zone
Subtropical
Described By
Herre, 1927

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