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Longfin Eels: Fascinating Aquatic Creatures

Learn about the Longfin Eel, Anguilla Diffenbachii, its habitat, life cycle, predators, and adaptive features. Discover the risks they face and how to help protect these unique fish.

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Longfin Eels: Fascinating Aquatic Creatures

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  1. Longfin Eels By Ryan Double April 2013

  2. Eel Name • Common name Longfin Eel • Scientific name Anguilla Diffenbachii • Family name Anguillidae • Maori name Tuna Kuwharuwharu

  3. Description • Long slender tubular fish • With scales, fins and it’s slimy • Colouring - dark brown to gray-black • Length - average 1.2 metres - up to 2 metres • Weight - average 10kg - up to 50kg • Its top fin is longer then its bottom fin

  4. Food • Small fish, insects, worms and snails • When they are older freshwater crayfish and baby ducks

  5. Predators • Overall man is the only predator by: • Fishing • Chemical discharges into rivers • Introducing trout and salmon (eat baby eels) • Changes to eel’s habitat eg lower waters levels, bank erosion • Weed removal

  6. Life Cycle • Adult eels lay eggs at sea then die • Fertilised eggs hatch to larvae & float back to land • When larvae reach land they become glass eels • They then turn into elver so to swim up rivers • Elvers turn into adult eels

  7. Adaptive Features • Slime covers their skin - helps them breath when out of water - keeps skin moist when out of water • They have bad eye site but amazing smell • They have sensors around the lips • They have rows of small sharp teeth that point backwards • They have scales embedded in their skin

  8. Habitat • Fresh water rivers & lakes • Found inland • Shady pools & willow lined creeks • Flowing water & stony river beds

  9. Bibliography • http://en.wikipedia.org/wiki/New_Zealand_longfin_eel • http://www.doc.govt.nz/conservation/native-animals/fish/facts/eel/ • http://www.longfineel.co.nz/longfin-tuna/ • http://www.nhc.net.nz/index/fresh-water-fish-new-zealand/longfin-eel/longfin-eel.htm • http://www.rangitane.iwi.nz/education/attachments/169_tuna_vweb.pdf

  10. These eels are at risk so we should respect them and their habitat. Before they become extinct. Think about what you can do. The End

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