Aspects of this topic are discussed in the following places at Britannica.
...of mola are longer in the body but are similarly cut short behind the dorsal and anal fins. The sharptail mola (Mola lanceolata, or Masturus lanceolatus) is also very large, but the slender mola (Ranzania laevis) is smaller, being about 70 cm (30 inches) long.
We welcome your comments. Any revisions or updates suggested for this article will be reviewed by our editorial staff. Contact us here.
Regular users of Britannica may notice that this comments feature is less robust than in the past. This is only temporary, while we make the transition to a dramatically new and richer site. The functionality of the system will be restored soon.