Belonoidei
| Belonoidei | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pacific jackfish ( Cololabis saira ) |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Belonoidei | ||||||||||||
The Belonoidei , also called Exocoetoidei , are a subordinate of the garfish-like (Beloniformes). The small freshwater , brackish water and marine fish are found in tropical and subtropical regions of the Atlantic and Indo-Pacific , in the Mediterranean , in South America , India and Southeast Asia .
features
The fish are slender, mostly round in cross-section, and are 5 centimeters to 2 meters long. Their fins are without hard rays, the dorsal and anal fins sit far back. The pectoral fins, which in most species start high on the fore body, are supported by 5 to 20 fin rays. The pelvic fins have six fin rays. You're sitting far down. In most cases the caudal fin is supported by 13 branched fin rays. Many species have long mandibles in some sections of their life cycle, including the adults in the half-beaked animals. The belonoids have only one nostril on each side of the head. The sideline runs far down the body. It is absent in some freshwater half-beak and in Cololabis adocetus . The number of branchiostegal rays is 6 to 15. The belonoidei have a single dentate pharyngealia . The basioccipital, a bone in the base of the skull, has vertical, plate-like outgrowths. The drop of oil that holds the eggs in suspension in many pelagic deep-sea fish is either missing or very small.
Internal system
- Garfish (Belonidae)
- Flying fish (Exocoetidae)
- Half-beak (Hemiramphidae)
- Zenarchopteridae
literature
- Joseph S. Nelson : Fishes of the World , John Wiley & Sons, 2006, ISBN 0-471-25031-7 .
- EO Wiley & GD Johnson (2010): A teleost classification based on monophyletic groups. In: JS Nelson, H.-P. Schultze & MVH Wilson: Origin and Phylogenetic Interrelationships of Teleosts, 2010, Verlag Dr. Friedrich Pfeil, Munich, ISBN 978-3-89937-107-9 .