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The New Zealand longfin eel (Anguilla dieffenbachii) is a species of freshwater eel that is endemic to New Zealand. It is the largest freshwater eel in New Zealand and the only endemic species – the other eels found in New Zealand are the native shortfin eel (Anguilla australis), also found in Australia, and the naturally introduced Australian longfin eel (Anguilla reinhardtii).
Eel blood is poisonous to humans [4] and other mammals, [5] [6] [7] but both cooking and the digestive process destroy the toxic protein. The toxin derived from eel blood serum was used by Charles Richet in his Nobel Prize-winning research, in which Richet discovered anaphylaxis by injecting it into dogs and observing the effect.
Anguilla celebesensis Kaup, 1856 (Celebes longfin eel) Anguilla dieffenbachii J. E. Gray, 1842 (New Zealand longfin eel) Anguilla interioris Whitley, 1938 (Highlands longfin eel) Anguilla japonica Temminck & Schlegel, 1847 (Japanese eel) Anguilla luzonensis S. Watanabe, Aoyama & Tsukamoto, 2009 (Philippine mottled eel)
Mass death may be due to a ‘stress event’ linked to climate change, officials say
The host is eaten by an eel, and the nematode finds its way from the eel's digestive tract to its swimbladder. An eel with an advanced parasite load shows symptoms such as bleeding lesions and swimbladder collapse. The eel becomes more susceptible to disease, its rate of growth slows, and if the infestation is severe enough, it may die.
New Zealand longfin eel; Polynesian longfinned eel; Speckled longfin eel; See also. Short-finned eel This page was last edited on 22 May 2018, at 17:59 (UTC). Text is ...
The mature eels then die, their eggs floating to the surface to hatch into very flat leaf-like larvae (called leptocephalus) that then drift along large oceanic currents back to New Zealand. [14] [17] This drifting is thought to take up to 15 months. [16] There have been no recorded captures of either the eggs or larvae of longfin eels. [14]
The short-finned eel is known to Māori as tuna, alongside the endemic New Zealand longfin eel. [11] They had a highly developed fishery for freshwater eels before the arrival of Europeans , and an extensive knowledge of the ecology of eels, harvesting them through a variety of techniques.