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🌊 Marine 🌡️ Tropical

Bloch's sand diver

Trichonotus blochii Castelnau, 1875
Max Length
14.3 cm
Max Weight
-
Lifespan
-
Trophic Level
3.4
Depth
-
Climate
Tropical
Resilience
-
Vulnerability
10.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Bloch's sand diver (Trichonotus blochii), first described by Castelnau, 1875 is a small fish in the family Trichonotidae (order Gobiiformes). Adults typically reach 14.30 cm in maximum length. It inhabits marine coastal and open-ocean environments. It occurs in Tropical waters. It feeds on a mix of small fish and invertebrates as a mid-level predator.

Scientific Name
Trichonotus blochii
Authority
Castelnau, 1875
Habitat
Marine
Climate
Tropical
Body Shape
Elongated
Max Length
14.3 cm
Trophic Level
3.4
Vulnerability
10.00/100
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 5 - 7; Dorsal soft rays (total): 43 - 46; Anal spines: 1; Anal soft rays: 39 - 41; Vertebrae: 55. This species is distinct with the following set of characters: D V-VII,43-46; A I,39-41; lateral line scales 57-60; gill rakers 4-6+17-21; vertebrae 55; head length (HL) 18-20% SL; snout length 25-31% HL; infraorbital and supraorbital canals separated anterior to eye; elongated dorsal fin spines in males 4-6; caudal fin in males with 2 black stripes .: elongated; Cross section: circular.

🌀 Behaviour

Behavioural data for Bloch's sand diver 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. Tropical Indian Ocean to Western Pacific: northern Australia.

🌿 Ecology

Zone Preferences
🌊 Marine
Trophic Level
3.4±0.4

📐 Morphometrics

Length–Weight Relationship: W = 0.00389 × L3.12 (TL)
Max TL
14.3cm
Dorsal Spines
6
Dorsal Rays
45
Anal Spines
1
Anal Rays
40
Vertebrae
55

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

📊 Population Risk & Fisheries

Fishing Vulnerability
10.00/100
Low vulnerability
Trophic Level
3.4
Predator
Body Shape
Elongated
Climate Zone
Tropical
Described By
Castelnau, 1875

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