What's the difference between needlefish and pipefish?

Needlefish

Definition:

(n.) The European great pipefich (Siphostoma, / Syngnathus, acus); -- called also earl, and tanglefish.
(n.) The garfish.

Example Sentences:

(1) A traumatic internal carotid-cavernous sinus fistula due to a penetrating injury caused by a needlefish is described.

Definition:

(n.) Any lophobranch fish of the genus Siphostoma, or Syngnathus, and allied genera, having a long and very slender angular body, covered with bony plates. The mouth is small, at the end of a long, tubular snout. The male has a pouch on his belly, in which the incubation of the eggs takes place.

Example Sentences:

(1) Oxhide glue has the highest content of amino acids, total Ajiao has the highest content of essential amino acids, but Ajiao and pipefish glues do not have cystine.
(2) The experimental results have shown that all six kinds of glue have a common protein zone, but only the pipefish glue has a band on the negative electrode side.
(3) The differentiation of the primary envelope of oocytes of the seahorse (Hippocampus erectus) and the pipefish (Syngnathus fuscus) has been investigated by techniques of light- and electron microscopy.