Southern bluefin tuna
📖 Overview
By maturity, most southern bluefin tuna lead an oceanic, pelagic existence . Spawning fish and larvae are encountered in waters with surface temperatures between 20° and 30°C. An opportunistic feeder, preying on a wide variety of fishes, crustaceans, cephalopods, salps, and other marine animals. Mostly canned . A specialized fishery for sashimi-quality has been developed recently by New Zealand fishers. In Japan, it is highly prized for the sashimi markets.
🔬 Taxonomy
🐟 Physical Description
Vertebrae: 39. A very large species, deepest near the middle of the first dorsal fin base. Swim bladder present. Lower sides and belly silvery white with colorless transverse lines alternating with rows of colorless dots. The first dorsal fin is yellow or bluish; the anal fin and finlets are dusky yellow edged with black; the median caudal keel is yellow in adults.: fusiform / normal; Cross section: oval.
🌀 Behaviour
Behavioural data for Southern bluefin tuna is currently being reviewed.
🦐 Diet
🥚 Reproduction
It is not known whether all mature fish spawn each year, every few years, or even only once in their lifetime .
🌍 Habitat & Distribution
Marine; pelagic-oceanic; oceanodromous ; depth range 0 - 2743 m . Temperate; 5°C - 20°C ; 10°S - 60°S, 180°W - 180°E west coast of Australia, up to 10°S.
🌿 Ecology
📐 Morphometrics
🌡️ Water Parameters & Tolerance
🛡️ Conservation Assessment
📊 Population Risk & Fisheries
🎣 Angling Guide
- heavy 30-80 lb class trolling rod
- conventional reel
- 80-130 lb wind-on leader
- temperature breaks
- floating debris
- current edges
- offshore seamounts
Use barbless hooks, minimise air exposure, and revive fish head-first in current before release.
⚠️ International management (ICCAT, WCPFC). Strict quotas and size limits.
🍽️ Edibility & Flavour
⚡ Nutrition
Per 100g cooked - Source: USDA FoodData Central
| Nutrient | Amount |
|---|---|
| Protein | 23.2 g |
| Omega-3 (total) | 740 mg |
🔬 Mercury Safety
Mercury data for Southern bluefin tuna has not yet been assigned. Please consult FDA/EPA guidance for general seafood safety advice.
🌿 Sustainability
🔬 Full Nutritional Profile
Per 100g - Raw, per 100g - Source: USDA FoodData Central templates (oily fish average)
📊 Population Dynamics
| Year | Region | Index | Notes |
|---|---|---|---|
| - | - | - |
🔍 Similar Species
👥 Community & Contribute
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