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

Diadromous Vulnerable 🌡️ Tropical

Reef manta ray

Mobula alfredi Krefft, 1868
Max Length
-
Max Weight
-
Lifespan
31 yrs
Trophic Level
3.5
Depth
0–120 m
Climate
Tropical
Resilience
Very low
Vulnerability
81.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Adults are commonly sighted inshore, within a few kilometers of land; found around coral and rocky reefs as well as along productive coastlines with consistent upwelling, tropical island groups, atolls and bays . Maximum movement recorded is >500,000 m . Known aggregations include sites in Hawai'i, Mozambique, Maldives, Ryukyu Island, Yap Island, Indonesia, eastern and western Australia . Gestation period is 12-13 months. Major food consists of planktonic organisms and probably small bony fishes . Maximum correted to 450 cm WD by Giuseppe Notarbartolo di Sciara (pers. Comm. 01/2025).

Scientific Name
Mobula alfredi
Authority
Krefft, 1868
Habitat
Diadromous
Climate
Tropical
Body Shape
Other
IUCN Status
VU
Lifespan
31 years
Depth Range
0–120 m
Latitude
34°S – 32°N
Trophic Level
3.5
Resilience
Very low
Vulnerability
81.00/100
Salinity
30–40 ppt

🐟 Physical Description

This species is characterized by the following: disc approximately 2.2-2.4 times as broad as it is long, the maximum disc width size approximately 550 cm; slender whip-like tail approximately 123% of disc length if intact; no distinct caudal spine or cartilaginous mass at base of tail; some specimens have small hump at the base of the tail on the dorsal surface, while others have a slight depression and groove on the dorsum of the tail immediately posterior to the posterior margin of the dorsal fin; small, knob-like dermal denticles evenly distributed on both the dorsal and ventral surfaces, with ventral surface having slightly larger denticles; dental ligament with small cusped teeth on the lower jaw measuring roughly 22% of total disc length, approximately 6-8 rows, 142-182 files across entire width of the tooth band; total tooth counts of 900-1500 for entire tooth band; top jaw lacks rows of enlarged denticles .: other.

🌀 Behaviour

Behavioural data for Reef manta ray is currently being reviewed.

🦐 Diet

Diet information for Reef manta ray is currently being compiled.

🥚 Reproduction

Size at Maturity
371.1cm TL

Young may tend to follow large objects such as their mother .

🌍 Habitat & Distribution

Marine; freshwater; benthopelagic; depth range 0 - 120 m . Tropical; 32°N - 34°S, 30°E - 134°W South Africa, Thailand to Western Australia.

🌿 Ecology

Zone Preferences
🌊 Marine 💧 Freshwater
Trophic Level
3.5±0.5

📐 Morphometrics

Length–Weight Relationship: W = 0.01 × L3.04 (TL)

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Vulnerable
Assessment Date
2018

📊 Population Risk & Fisheries

Population Resilience
Very low
Minimum doubling time
Fishing Vulnerability
81.00/100
Very High vulnerability
Trophic Level
3.5
Predator
Body Shape
Other
Climate Zone
Tropical
Latitude Range
32°N – 34°S
Described By
Krefft, 1868

👥 Community & Contribute

Aquareap Community Observations
0 Observations logged on Aquareap

No observations yet - be the first to log one!

View all observations for Reef manta ray ↗
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.