New 🐟 Mercury Safety Guide & Omega-3 Rankings Updated for 2026. View Omega-3 Rankings →

Diadromous Least Concern ⚠️ Venomous ⚡ Poisonous to eat 🌡️ Tropical

Milkspotted puffer

Chelonodon patoca Hamilton, 1822
Max Length
38 cm
Max Weight
-
Lifespan
-
Trophic Level
3.1
Depth
4–60 m
Climate
Tropical
Resilience
Medium
Vulnerability
38.00/100
Typical Length
-
Depth Zone
reef

📖 Overview

Inhabits coastal waters and enters the lower reaches of rivers and lagoons . Occurs on sand and mudflats, usually in estuaries . Usually found around the mouths of rivers or in brackish mangrove estuaries and sometimes penetrates fresh water, but is never found more than a few km from the sea . Often in schools and sometimes swims up freshwater streams . Considered a delicacy in Japan .

Scientific Name
Chelonodon patoca
Authority
Hamilton, 1822
Habitat
Diadromous
Climate
Tropical
Body Shape
Short and / or deep
IUCN Status
LC
Max Length
38 cm
Depth Range
4–60 m
Latitude
35°S – 39°N
Trophic Level
3.1
Resilience
Medium
Vulnerability
38.00/100
Migration
Anadromous
Water Temp
23–28 °C
Salinity
30–40 ppt

🐟 Physical Description

Dorsal spines (total): 0; Dorsal soft rays (total): 9 - 11; Anal spines: 0; Anal soft rays: 8 - 10. Body covered with prickles . : short and / or deep.

🌀 Behaviour

Behavioural data for Milkspotted puffer is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

🐣 Oviparous

Oviparous .

🌍 Habitat & Distribution

Marine; freshwater; brackish; reef-associated; anadromous ; depth range 4 - 60 m . Tropical; 23°C - 28°C ; 39°N - 35°S, 20°E - 150°E East Africa to the Admiralty Islands, New Britain and Trobiand Islands, north to China, south to northern Australia.

🌿 Ecology

Zone Preferences
🌊 Marine 💧 Freshwater 🌿 Brackish 🪸 Reef Associated
Migration
Anadromous
Trophic Level
3.1±0.4
🐠 Schooling

📐 Morphometrics

Length–Weight Relationship: W = 0.0263 × L2.88 (TL)
Max TL
38cm
Dorsal Rays
10
Anal Rays
9

🌡️ Water Parameters & Tolerance

Temperature Range
23–28°C
Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2020

📊 Population Risk & Fisheries

Population Resilience
Medium
Minimum doubling time
Fishing Vulnerability
38.00/100
Moderate vulnerability
Trophic Level
3.1
Predator
Body Shape
Short and / or deep
Climate Zone
Tropical
Latitude Range
39°N – 35°S
Described By
Hamilton, 1822

⚠️ Venom Profile

Medical Warning: This species is venomous. Seek immediate medical attention if envenomated. Contact emergency services and follow first aid guidance below.
Venom Type
proteinaceous neurotoxin
Delivery
dorsal, anal, and pelvic fin spines
Potency
Severe
Mortality Risk
Low
Symptom Onset
5min
Duration
24.0hrs
Antivenom
✗ Not Available
Named Toxins
high-molecular-weight protein (Stonustoxin analogue) acetylcholine
Symptoms
  • immediate intense pain
  • swelling
  • erythema
  • occasional nausea and weakness
Affected Body Systems
peripheral nervous system cardiovascular
First Aid
Immerse affected area in hot water (45 C, tolerable) for 30-90 minutes to denature toxin. Do not apply ice.
Medical Treatment

Analgesia; wound care; tetanus prophylaxis; severe cases may require monitoring for systemic effects.

References: Compiled from Bhide (2018), Halstead et al. (1988) and family-specific envenomation literature

🌐 Names & Taxonomy

Language Common Names
🇬🇧English Bengal Reticulated Puffer · marbled toado · Milkspotted puffer
🇯🇵Japanese オキナワフグ
🇷🇺Russian молочнопятнистый иглобрюх · Хелонодон пестрый (попугайный)

🗺️ Global Occurrence Map

Occurrence records from the Global Biodiversity Information Facility (GBIF) - 50 records indexed .

Occurrence density from GBIF View GBIF records ↗

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Milkspotted puffer ↗
Suggest an Edit

Spotted incorrect or outdated data? Submit a correction and our editorial team will review it. Approved edits go live within 48 hours.

Link to a scientific paper, FishBase, or other authoritative source
Report an Issue

Found a factual error, broken data, or inappropriate content? Let us know and we will investigate promptly.