Shorefishes of the Eastern Pacific online information system

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Species: Ranzania laevis, Slender mola, Slender sunfish

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elongate (height = 1/2 length)
dark-edged pale bars & vertical rows black dots
C very short, oblique
lips = vertical slit



Ranzania laevis (Pennant, 1776)

Slender mola, Slender sunfish

Body an elongate oval (depth 25-48% of SL), strongly compressed; mouth small, funnel like, a vertical slit when closed, opens at the front, is a beak (without a central suture) composed of teeth fused to the jaws; gill openings small, on side just before pectorals; gill rakers not covered with skin; pectorals long, pointed; no pelvics; dorsal fin 17-19 rays; anal fin 18-19 rays; pectoral fin 13 rays; no tail base; dorsal and anal fins long and high, symmetrical, used for locomotion, at rear of body, their rear rays joined to tail fin immediately behind them that is reduced to a vertically elongate, short, blunt rudder, with oblique profile, no rear pointed extension; skin smooth, covered with small, hard, hexagonal plates.

Dark grey to dark blue above, silvery on sides and belly; head and lower belly with thin undulating black-edged white bars; white spots and vertical streaks on body between dorsal and anal fins.

Size: 200 cm.

Habitat: oceanic.

Depth: 0-200 m.

Circumtropical; possibly throughout our region except most of the Gulf of California.

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  • Marine
  • Marine Only
  • Offshore Only
  • Offshore
Water Column Position
  • Water column only
  • Near Surface
  • Surface
  • Mid Water
  • Water column
FishBase Habitat
  • Pelagic
Feeding Group
  • No Data
  • Planktivore
  • Data
  • Pelagic fish larvae
  • Zooplankton
Egg Type
  • No data
  • Pelagic larva
  • Pelagic
Global Endemism
  • "Transpacific" (East + Central &/or West Pacific)
  • Transisthmian (East Pacific + Atlantic of Central America)
  • TEP non-endemic
  • All species
  • Circumtropical ( Indian + Pacific + Atlantic Oceans)
  • East Pacific + all Atlantic (East+West)
  • East Pacific + Atlantic (East +/or West)
Regional Endemism
  • All species
  • Continent + Island (s)
  • Tropical Eastern Pacific (TEP) non-endemic
  • Eastern Pacific non-endemic
  • Continent
  • Island (s)
  • Resident
Climate Zone
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • North Temperate (Californian Province &/or Northern Gulf of California)
  • South Temperate (Peruvian Province )
IUCN Red List
  • Not evaluated / Listed
  • Not listed
Length Max
  • 200
Depth Range Min
  • 0
Depth Range Max
  • 200