The greater pipefish or Nilsson 's pipefish , `` Syngnathus rostellatus '' , is a pipefish similar to the lesser pipefish , but with no crest above the head .
The lesser pipefish or Nilsson 's pipefish , `` Syngnathus rostellatus '' , is a pipefish similar to the greater pipefish , but with no crest above the head .