arrow worms
Also known as Chaetognath, Chaetognaths, Arrow worm, Chaetognatha
The Chaetognatha or chaetognaths (meaning bristle-jaws) are a phylum of predatory marine worms that are a major component of plankton worldwide. Commonly known as arrow worms, they are mostly pelagic; however about 20% of the known species are benthic, and can attach to algae and rocks. They are found in all marine waters, from surface tropical waters and shallow tide pools to the deep sea and polar regions. Most chaetognaths are transparent and are torpedo shaped, but some deep-sea species are orange. They range in size from .
AI overview
Arrow worms are small, predatory marine worms that are a major part of plankton in all ocean environments, ranging from tropical surface waters to the deep sea. They are mostly transparent and torpedo-shaped, making them well-adapted hunters in the ocean food web.
AI-generated from the Wikipedia summary — may contain errors.
Species
arrow worms
Phylum
- PhylumChaetognatha
Habitatmarine
綱 †古箭蟲綱 Archisagittoidea 箭蟲綱 Sagittoidea 毛顎動物門（學名：Chaetognatha）是動物界的一個小門，以前認為是後口動物中的一個小分支，現在的研究發現可能不屬於後口動物{{來源請求}}，總共只有50種，都是海洋生活的小型動物。除鋤蟲屬毛顎動物為底棲生活之外，其餘的都是浮游生活，牠們在海洋浮游生物中佔有重要的地位。不同的毛顎類動物在海洋中的分佈受溫度、緯度及鹽度的製約，但有相當部分種類的分佈是世界性的，熱帶海洋中的分佈最為豐富。 分類 現存的毛顎動物門的種類都屬於箭蟲綱。下設2目5科6屬。 †古箭蟲綱 Archisagittoidea †古箭蟲科 Amiskwiidae †阿米斯克毛顎蟲屬 Amiskwia 箭蟲綱 Sagittoidea 腹橫肌目 Phragmophora 鋤蟲科 Spadellidae 鋤蟲屬 Spadella 真撬蟲科 Eukrohniidae 真撬蟲屬 Eukrohnia 異撬蟲屬 Heterokrohnia 無橫肌目 Aphragmophora 扇齒亞目 Flabellodontia 撬蟲科 Krohnittidae 撬蟲屬 Krohnitta 櫛齒亞目 Ctenodontia 翼箭蟲科 Pterosagittidae 翼箭蟲屬 Pterosagitta 箭蟲科 Sagittidae 箭蟲屬 Sagitta 规范控制 AAT: 300310247 GND: 4174022-1 NDL: 00567759 這是與無脊椎動物相關的小作品。你可以通过编辑或修订扩充其内容。 查 论 编 后鞭毛生物:动物现存门分类表 域 古菌 细菌 真核生物 (界 植物 Hacrobia（英语：Template:Hacrobia） 不等鞭毛类（英语：Template:Heterokont） 囊泡虫 有孔虫（英语：Template:Rhizaria） 古虫 变形虫（英语：Template:Amoebozoa） 动物 真菌) 侧生动物 多孔动物门 钙质海绵纲 寻常海绵纲 六放海绵纲 扁盘动物门 丝盘虫 中生动物 直泳动物门 菱形动物门 单胚动物门 真后生动物辐射对称动物 栉水母动物门 刺胞动物门 珊瑚纲 水螅纲 钵水母纲 立方水母纲 十字水母纲（英语：Stauromedusae） 多足动物纲（英语：Polypodiozoa） 黏体动物 两侧对称动物 异无腔动物 无腔动物门 异涡动物门 肾管动物（英语：Nephrozoa） 原口动物 未命名基群 毛颚动物门 蜕皮动物 环神经动物（英语：Cycloneuralia） 有棘动物（英语：Scalidophora） 动吻动物门 铠甲动物门 鳃曳动物门 线虫动物 线虫动物门 线形动物门 泛节肢动物 有爪动物门 缓步动物门 节肢动物门 螺旋動物 有颚动物（英语：Gnathifera (
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Article
18 sectionsContents
- Anatomy
- Head and digestive system
- Nervous and sensory systems
- Internal organs
- Locomotion
- Reproduction and life cycle
- Behaviour
- Ecology
- Genetics
- Mitochondrial genome
- Phylogeny and evolution
- Evolution and relationship to other animals
- Fossil record
- Internal phylogeny
- History
- Infection by giant viruses
- References
- External links
The Chaetognatha or chaetognaths (meaning bristle-jaws) are a phylum of predatory marine worms that are a major component of plankton worldwide. Commonly known as arrow worms, they are mostly pelagic; however about 20% of the known species are benthic, and can attach to algae and rocks. They are found in all marine waters, from surface tropical waters and shallow tide pools to the deep sea and polar regions. Most chaetognaths are transparent and are torpedo shaped, but some deep-sea species are orange. They range in size from .
Chaetognaths were first recorded by the Dutch naturalist Martinus Slabber in 1775. As of 2021, biologists recognize 133 modern species assigned to over 26 genera and eight families. Despite the limited diversity of species, the number of individuals is large.