Assertion: flounder's fin | /r/Synonym | rajiform locomotion
Facets:
value: to glide along the water floor
type: PURPOSE
Source sentences:
text: The flattened body shape, ventral eyes and well developed spiracles of the skate allows them to live benthically, buried in the sediment or using a longitudinal undulation of the pectoral fins known as Rajiform locomotion to glide along the water floor.