Diagnostic Description
provided by Fishbase
Brownish above, sides silvery, iridescent, with black peritoneum showing through (Ref. 7344).
- Recorder
- Cristina V. Garilao
Life Cycle
provided by Fishbase
Are synchronous hermaphrodites, gonads consist of clearly defined and well separated ovarian and testicular regions with no indication of sequential maturation of the sex products (Ref. 84733). Also Ref. 103751.
Morphology
provided by Fishbase
Dorsal spines (total): 0; Dorsal soft rays (total): 9 - 12; Analspines: 0; Analsoft rays: 14 - 16
- Recorder
- Cristina V. Garilao
Trophic Strategy
provided by Fishbase
Carnivorous, feeds on squids and pelagic fishes.
- Recorder
- Drina Sta. Iglesia
Biology
provided by Fishbase
Meso- and bathypelagic at 700-1830 m (Ref. 58302). Probably swift swimmers, which can avoid nets, captured singly or in small groups (Ref. 6692). Carnivorous, feed on squids and pelagic fishes (Ref. 6692). Oviparous and are synchronous hermaphrodites (Ref. 84733).
- Recorder
- Crispina B. Binohlan
Importance
provided by Fishbase
fisheries: of no interest
- Recorder
- Crispina B. Binohlan
分布
provided by The Fish Database of Taiwan
廣泛分布於世界三大洋之熱帶及溫帶海域。臺灣則發現於東北部水域。
利用
provided by The Fish Database of Taiwan
罕見魚類,除學術研究外,無經濟價值。
描述
provided by The Fish Database of Taiwan
體延長而側扁。頭大,背部緣斜直。吻長而尖。眼大。口大,上頜骨末端延伸至前鰓蓋骨緣;下頜骨高,前端截形;上下頜齒各一列,上頜齒小,僅前端兩側1-3齒擴大,下頜齒發達,具數顆矛形大犬齒;鋤骨無齒;腭骨具齒。體柔軟無鱗;皮膚薄。側線退化。尾柄兩側各具一縱皮褶。背鰭小,位於體後半部;脂鰭在尾柄前方;臀鰭後位,接近尾鰭,基底長於背鰭基底;胸鰭小,近腹側;腹鰭小,起點在背鰭基底中部;尾鰭分叉。體淡灰色,背正中自頭後部至尾基部有一黑色縱帶。尾柄皮褶黑色。鰭無色。
棲地
provided by The Fish Database of Taiwan
深海底層洄游性魚類,棲息深度在100-1,000公尺間,以烏賊及洄游性魚類為食。
Hammerjaw
provided by wikipedia EN
The hammerjaw, Omosudis lowii, is a small deep-sea aulopiform fish, found worldwide in tropical and temperate waters to 4,000 m (13,000 ft) depth. It is the only representative of its family, Omosudidae (from the Greek omo, "shoulder", and Latin sudis, either "esox, fish of the Rhine" or "stake").
Description
Illustration of a hammerjaw
The large head is dominated by a massive, truncated lower jaw and large, high-set eyes. The lower jaw has a dark, almost black distal end, "chin". The lower jaw possesses at least one pair of oversized, transparent, and dagger-like teeth; the palatines possess 1–4 pairs of slightly smaller teeth. The body itself is scaleless and laterally compressed; it is covered in iridescent, silvery-gray guanine with the dark peritoneum peeking through in places. Dark smoky gray dorsally, the body tapers strongly towards a thin caudal peduncle (which has a dermal keel) and deeply forked caudal fin. The caudal peduncle is a smoky black color, darker than the body and tail. All fins are spineless; both the low-slung pectoral fins (with 11–16 soft rays) and abdominal pelvic fins (with eight soft rays) are fairly small.
The single dorsal fin (with 9–12 soft rays) and anal fin (14–16 soft rays) are roughly equal in size; the anal fin's origin lies immediately posterior to the dorsal. The lateral line is uninterrupted and the gill rakers number 20–25. Like other members of their order, hammerjaws also possess a small adipose fin. The largest recorded hammerjaw measured 23 cm (9 inches) standard length (excluding the caudal fin).
Life history
Very little is known of the hammerjaw's life history. It inhabits the mesopelagic and bathypelagic zones down to 4,000 m and is never caught in large numbers. It is inferred from their sporadic capture and sleek morphology that hammerjaws are swift swimmers—capable of avoiding sampling nets. Hammerjaws appear to spawn year-round; like many other deep-sea aulopiform fish, they are hermaphrodites. They are carnivorous and feed on squid and other pelagic fish; in turn, hammerjaws are known prey of lancetfish and tuna.
References
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- cc-by-sa-3.0
- copyright
- Wikipedia authors and editors
Hammerjaw: Brief Summary
provided by wikipedia EN
The hammerjaw, Omosudis lowii, is a small deep-sea aulopiform fish, found worldwide in tropical and temperate waters to 4,000 m (13,000 ft) depth. It is the only representative of its family, Omosudidae (from the Greek omo, "shoulder", and Latin sudis, either "esox, fish of the Rhine" or "stake").
- license
- cc-by-sa-3.0
- copyright
- Wikipedia authors and editors
Diet
provided by World Register of Marine Species
Carnivorous, feeds on squids and pelagic fishes
North-West Atlantic Ocean species (NWARMS)
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- cc-by-4.0
- copyright
- WoRMS Editorial Board
Distribution
provided by World Register of Marine Species
Worldwide in tropical and temperate waters to 43.68°N
North-West Atlantic Ocean species (NWARMS)
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- cc-by-4.0
- copyright
- WoRMS Editorial Board
Habitat
provided by World Register of Marine Species
bathypelagic; marine ; depth range 100 - 1000 m
North-West Atlantic Ocean species (NWARMS)
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- cc-by-4.0
- copyright
- WoRMS Editorial Board
Habitat
provided by World Register of Marine Species
nektonic
North-West Atlantic Ocean species (NWARMS)
- license
- cc-by-4.0
- copyright
- WoRMS Editorial Board