| 词条 | Platy (fish) |
| 释义 |
The two species, the southern platyfish and the variatus platy, have been interbred to the point where they are difficult to distinguish. Most platies now sold in aquariums are hybrids of both species.[2] Platy{{main|Southern platyfish}}The platy (Xiphophorus maculatus) grows to a maximum overall length of 7.0 cm (2.8 in). Sexual dimorphism is slight, the male’s caudal fin being more pointed. The anal fin of the male fish has evolved into a gonopodium, a stick-shaped organ used for reproduction. The female southern platyfish’s anal fin is fan-shaped. Wild varieties are drab in coloration, lacking the distinctive dark lateral line common to many Xiphophorus species. Platies can have from 20–50 fry (baby fish) at once, as often as once a month. They may also eat their own young. Variatus platy{{main|Variatus platy}}The variatus platy (Xiphophorus variatus) grows to a maximum overall length of 7.0 cm (9.7 in). In the wild they are olive in color with black marbling or spots on the side of the caudal peduncle. Large males show blackish blotches on the dorsal fin. Unlike some other members of the genus, X. variatus has no claw at the tip ]] ray. The fourth pectoral ray shows well-developed serrae (i.e. saw-like notches). They typically have 20 to 24 lateral scales, 10 to 12 dorsal rays and two rows of jaw teeth.[3] AquariumPlaty is widely used in tropical aquariums. Several different color variations have been developed, such as red, yellow, orange, blue, rainbow (combination of colors) and white. See also
References1. ^ {{cite web | url = http://www.fishlore.com/Profiles-Platy.htm | title = Platy, Platies - Xiphophorus maculatus | accessdate = 2010-07-24 | work = FishLore.com}} 2. ^1 {{cite web | url = http://animal-world.com/encyclo/fresh/livebearers/platy.php | title = Platies - Moonfish, Variegated Platy, Variatus Platy | accessdate = 2010-07-24 | work = Animal-World}} 3. ^{{Cite book| last=Page | first=Lawrence M.; Burr, Brooks M.| title=A Field Guide to Freshwater Fishes| year=1991| publisher=Houghton Mifflin| place=New York| isbn=0-395-91091-9}} 5 : Live-bearing fish|Ovoviviparous fish|Xiphophorus|Fish of Guatemala|Fish common names |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。