Classification / Names
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Ophidiiformes (Cusk eels) >
Bythitidae (Livebearing brotulas)
Etymology: Grammonus: Greek, gramma = signal, mark + Greek, onos = hake; yunokawai: Named for Mr. Kyo Yunokawa, of Ie-shima Diving Center..
More on author: Nielsen.
Environment: milieu / climate zone / depth range / distribution range
বাস্তুসংস্থান
সামুদ্রিক তলদেশ বিহারী; গভীরতার পরিসীমা ? - 20 m (Ref. 75999). Temperate
Northwest Pacific: Japan.
আকৃতি / ওজন / Age
Maturity: Lm ? range ? - ? cm
Max length : 9.8 cm SL (female)
পৃষ্ঠীয় নরম পাখনা দন্ড (মোট ): 83; পায়ূর নরম পাখনা্তুন্ড: 64; কশেরুকা : 41. This species has the following characters: Dorsal-fin rays 83; anal-fin rays 64; caudal fin rays 9; pectoral 23-24; vertebrae 12 + 29; anterior anal fin ray is placed below 23rd dorsal fin ray; maximum depth of head is 32.0% SL; predorsal length 41.5% SL; interorbital width 10.5% SL; height of posterior margin of maxilla 8.4% SL (Ref. 75999).
Known only from one female specimen with ovaries containing eggs up to about 0.5 mm in diameter and apparently with no embryos. It was caught by hand in the back of the cave in absolute darkness. The head and lateral line pore systems are well developed, also the sensory papillae on the head and body, indicating adaptation to the lightless environment
Also observed and caught were a shrimp Parhippolyte misticia and the fishes Pseudamia hayashiiand Apogon evermanni (Ref. 75999).
Life cycle and mating behavior
পরিপক্কতা | প্রজনন | ডিম ছাড়া | ডিমসমূহ | ডিম্বধারন ক্ষমতা | শুককীট
Nielsen, J.G., 2007. Grammonus yunokawai (Ophidiiformes: Bythitidae), a new marine cave fish from the Ryukyu Islands. Ichthyol. Res. 54(4):374-379. (Ref. 75999)
IUCN Red List Status (Ref. 130435)
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