Myxine glutinosa Lophius Sharks Skates and Rays Patrick Leary 1.1a.jpg 1.1a.jpg Image 1.2a.jpg 1.2a.jpg Image Myxine glutinosa http://uio.mbl.edu/fishKey/index.php?func=search&string=Myxine+glutinosa Text Lophius http://uio.mbl.edu/fishKey/index.php?func=search&string=Lophius Text Key to Sharks Keys/sharks/sharks.LIF InteractiveResource Key to Skates and Rays Keys/skates/skates.LIF InteractiveResource 2004-06-18T07:51:33 (c) 2004 uBio Project : Marine Biological Laboratories header expandadd 15 Unknown ? ToBeCoded DoesNotExist NotApplicable n/a CannotBeCoded CannotExist Lucid certainty modifiers perhaps (by misunderstanding) (by misunderstanding) true Lucid frequency modifiers rarely rarely Gills Has five gill openings on each side Has either one or no gill openings on each side Body Shape The body in cross section is more or less rounded Body flattened in cross section Body long and slender; eel-like Jaws Has no jaws Has jaws lower jaw projecting so far beyond upper that most teeth in lower jaw exposed when mouth closed most teeth in lower jaw not exposed when mouth closed Eyes Has no external eyes Has external eyes both eyes on same side of head one eye on each side of head Mouth Mouth enormous and directed upward Mouth not enormous Tail Body tapers to a whiplike tail ("Rattail") Tail not whiplike Lunate (Crescent) shape Triangular tail, straight or convex edge Triangular tail, concave edge Light Producing Organs Numerous light-producing organs (photophores) along the ventral surface No light-producing organs (photophores) long the ventral surface Body Size Body long and slender; body's greatest height (not counting dorsal fin) less than or equal to 1/5 of total body length Body shorter and stouter; body's greatest height (not counting dorsal fin) greater or equal to 1/4 to total body length Belly Shape The belly in cross-section has a bottom edge that is sharp-edged The belly in cross-section has a bottom edge that is more or less rounded Small Fins Four or more small fins between last dorsal fin and caudal fin and between anal fin and caudal fin No small fins between last dorsal fin and caudal fin and between anal fin and caudal fin Dorsal Fin length Base of longest dorsal fin 1/7 or less of total body length Base of longest dorsal fin 1/6 or more of total body length Dorsal Fin Features The front half of the first dorsal fin is supported entirely by segmented, fairly soft bones (called rays) The front half of the first dorsal fin is supported entirely by unsegmented, often very hard bones (called spines) One dorsal fin Two dorsal fins Anal Fins Base of anal fin long, more than 1/5 of total body length. Pectoral fins large, usually more than 1/5 of total body length If two dorsal fins are present, base of anal fin usually less than 1/5 of total body length. Pectoral fins small, usually less than 1/5 total body length Weight Over 10 lbs (5kg) Over 100 lbs (45 kg) Over 300 lbs (136 kg)