Japanese eagle ray
📖 Overview
Found from the intertidal to the uppermost continental slope . A carnivore feeding on benthic animals. Ovoviviparous . Males and females ranged in size from 24.5-61.9 and 21.4-65.6 cm DW, respectively. Five males between 42.9 and 61.9 cm DW were found to be mature and a 41.0 cm DW male was adolescent, while 18 males between 24.5 and 32.3 cm DW were immature. A female of 65.6 cm DW was found pregnant. A reported abnormal female specimen was 66.5 cm DW and weighed 5.5 kg. The largest male examined was 61.9 cm DW had a total length of 125.7 cm .
🔬 Taxonomy
🐟 Physical Description
This small species (attaining about 66.5 cm DW) has the following set of characters: colour of dorsal surfaces yellowish brown, usually with variable, irregular dark blotches; tail with a very weak ventral skin fold; stinging spine(s) are relatively long (longest spine 10.3-18.6% DW); interorbital space is shallowly concave in adult males; anterior margins of pectoral fins moderately convex; cranial fontanelle (visible in dorsal view without dissection) is relatively narrow with mostly straight lateral margins; claspers of adult males 6.6-10.2% DW; predorsal length 66.6-78.8% DW; each jaw with 7 rows of teeth, with a broad median row flanked by three smaller rows on each side; pectoral-fin radials 79-85 (excluding rostral propterygial radials anterior of the eyes); total vertebral centra (including synarcual) 115-124; males mature by 42.9 cm DW .Cross section: flattened.
🌀 Behaviour
Behavioural data for Japanese eagle ray is currently being reviewed.
🦐 Diet
Diet information for Japanese eagle ray is currently being compiled.
🥚 Reproduction
Exhibit ovoviparity (aplacental viviparity), with embryos feeding initially on yolk, then receiving additional nourishment from the mother by indirect absorption of uterine fluid enriched with mucus, fat or protein through specialised structures .
🌍 Habitat & Distribution
Marine; demersal; depth range 0 - 220 m . Tropical Northwest Pacific: Russia, China, South Korea and Japan.
🌿 Ecology
📐 Morphometrics
🌡️ Water Parameters & Tolerance
🛡️ Conservation Assessment
📊 Population Risk & Fisheries
🌐 Names & Taxonomy
| Language | Common Names |
|---|---|
| 🇬🇧English | Japanese Eagle Ray · Kite Ray |
| 🇯🇵Japanese | Tobi-ei · Tobiei · トビエイ |
| 🇨🇳Chinese | 土地公燕 · 燕魟 · 飛魴仔 · 鳶鱝 · 鷹魴 |
Scientific Synonyms
| Scientific Name | Author | Year | Status |
|---|---|---|---|
| Mobula tobijei | Bleeker | 1854 | Synonym |
| Myliobatis cornuta | Günther | - | Synonym |
| Myliobatis tobije | Bleeker | 1854 | Synonym |
🔍 Similar Species
🗺️ Global Occurrence Map
Occurrence records from the Global Biodiversity Information Facility (GBIF) - 4 records indexed .
👥 Community & Contribute
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