* Genus Anoxypristis
o Knifetooth sawfish, Anoxypristis cuspidata (Latham, 1794).
Also known as the narrow or pointed sawfish. Lives in muddy areas, appears grey.
* Genus Pristis
o Dwarf sawfish, Pristis clavata Garman, 1906.
Also known as the Queensland sawfish. Inhabits muddy bays and estuaries along the northern coast of Australia. Relatively small compared to other species, only around 1.4 m.
o Largetooth sawfish, Pristis microdon Latham, 1794.
Inhabits freshwater systems and have been found deep inland. The largest Australian freshwater fish.
o Smalltooth sawfish, Pristis pectinata Latham, 1794.
Also known as the wide sawfish. Lives in muddy areas, appears green or bluish-grey. Found Also lives in the Caribbean and around the Australian and African coastlines.
o Large-tooth sawfish, Pristis perotteti Müller & Henle, 1841.
Lives around the Caribbean and Central American coastline. Seriously endangered in Central and South America, especially Lake Nicaragua.
o Common sawfish, Pristis pristis (Linnaeus, 1758).
Once plentiful in the eastern Atlantic and Mediterranean, this species has become either critically endangered or is assumed extinct.
o Longcomb sawfish, Pristis zijsron Bleeker, 1851.
Prefers muddy bays and estuaries. The most common sawfish.
[ 本帖最后由 ozbird 于 22-3-2009 13:27 编辑 ]作者: ozbird 时间: 22-3-2009 13:46
澳大利亚是淡水鱼区系最独特的一个大陆。澳大利亚是孤立而干旱的大陆，澳洲真正纯正的淡水鱼只有澳洲肺鱼和巩鱼（澳洲喷点龙）这些古老的家伙。而其他澳洲的淡水鱼大多是源自海洋，由海水鱼演化来的。和澳洲接近的大陆只有南美洲南部。南美洲北部是世界上淡水鱼最丰富的地方，但是南部却是淡水鱼种类最稀少的地方，淡水鱼也大多是来自海洋。除了淡水鱼之外，南美洲南部和澳洲还有其他一些类似的地方。作者: Espresso 时间: 22-3-2009 21:01
sawfish 海里也有啊作者: Espresso 时间: 22-3-2009 21:05
Sawsharks live in deep offshore waters in many parts of the world while sawfish live in shallower coastal waters.作者: Espresso 时间: 22-3-2009 21:06
给我加30分先，要不我说你题出错了。作者: 136mydream 时间: 22-3-2009 21:22
我答的是你出的题目啊，又不是我自己出的
