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单词 pristis
释义

Pristis


Thesaurus
Noun1.Pristis - type genus of the PristidaePristis - type genus of the Pristidae genus Pristisfish genus - any of various genus of fishfamily Pristidae, Pristidae - large primitive rays with elongated snoutsPristis pectinatus, smalltooth sawfish - commonly found in tropical bays and estuaries; not aggressive

Pristis


Pristis

 

(sawfish), the only genus of the family Pristidae. Sawfish are distinguished from other rays by their greatly elongated and flattened snout, which has toothlike structures on both sides. Saw sharks have a similar snout, but sawfish have a flatter body, no cirra, and ventral gill openings. There are seven species, distributed in the tropical and subtropical waters of oceans throughout the world. They live in shallows and occasionally enter rivers. Sawfish feed on fish and on invertebrates, which they sometimes dig up from the sand or mud with their snout. They are oviviviparous, producing 15 to 20 young. The American, or smalltooth, sawfish (P. pectinatus) reaches a length of 4.8 m and a weight of 2 tons. Sawfish have almost no commercial significance, and they are not harmful to man.

Pristis


  • noun

Synonyms for Pristis

noun type genus of the Pristidae

Synonyms

  • genus Pristis

Related Words

  • fish genus
  • family Pristidae
  • Pristidae
  • Pristis pectinatus
  • smalltooth sawfish
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更新时间:2025/3/16 16:55:50