Assertion: eel's fin | /r/HasProperty | long dorsal
Facets:
Source sentences:
text: They have a long dorsal fin that extends from the head down the entire length of their bodies, where it fuses with the tail (caudal) and tail fins so it becomes continuous with the tail.
text: Moray eels also have a long dorsal fin that extends down the entire length of their bodies from the head.