page_title: Pisces in the 10th edition of Systema Naturae
section_title: Apodes
hierarchical_section_title: Pisces in the 10th edition of Systema Naturae / Apodes
caption_attribution_description: English: w:Seawolf (fish). source: http://www.photolib.noaa.gov/sanctuary/sanc1005.htm (now at: http://www.photolib.noaa.gov/htmls/sanc1005.htm; original caption: A Wolf Fish - Anarhichas lupus - hiding in the rocks)
context_page_description: In the 10th edition of Systema Naturae, Carl Linnaeus described the Pisces as:
  Always inhabiting the waters; are swift in their motion and voracious in their appetites. They breathe by means of gills, which are generally united by a bony arch; swim by means of radiate fins, and are mostly covered over with cartilaginous scales. Besides the parts they have in common with other animals, they are furnished with a nictitant membrane, and most of them with a swim-bladder, by the contraction or dilatation of which, they can raise or sink themselves in their element at pleasure.
  Linnaean Characteristics
  Heart: 1 auricle, 1 ventricle. Cold, dark red blood
  Gills: external
  Jaw: incumbent
  Penis: none
  Eggs: without whites
  Organs of Sense: tongue, nostrils?, eyes, ears
  Covering: imbricate scales
  Supports: fins. Swims in the Water & Smacks.
context_section_description: Muraena (eels)
  Muraena helena – Mediterranean moray
  Muraena ophis – Spotted snake eel
  Muraena serpens – Serpent eel
  Muraena angvilla – European eel
  Muraena myrus – Painted eel
  Muraena conger – European conger
  Muraena caeca – European finless eel
  Gymnotus (electric knifefishes)
  Gymnotus carapo – Banded knifefish
  Gymnotus asiaticus – Snakehead
  Trichiurus (cutlassfishes)
  Trichiurus lepturus – Largehead hairtail
  Anarhichas (wolffishes)
  Anarhichas lupus – seawolf
  Ammodytes (sand eels)
  Ammodytes tobianus – Lesser sand eel
  Stromateus (butterfishes)
  Stromateus fiatola – Blue Butterfish
  Stromateus paru – American Harvestfish
  Xiphias (swordfishes)
  Xiphias gladius – Swordfish
caption: The seawolf was named Anarhichas lupus in 1758.
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