There are three species under the family Molidae: Mola mola, Mola alexandrini, and Mola tecta.

Mola mola is the most common known ocean sunfish and was found in 1758 and Mola alexandrini (also called Mola ramsayi) was found 81 years afterward.
In 1883, Mola alexandrini was found.
In comparison to its two relatives, Mola tecta was found recently in 2014.
Ten years before Mola tecta was officially named in 2014, the Japanese researchers found out that there is a new Mola species based on the genetic information they obtained from the Australian water.
However, they were not able to obtain more information about this new Mola species and they did not know exactly what this Mola species looked like.
According to Nyegaard, the first person who described Mola tecta, the Mola tecta are hard to study because they are hard to find and their huge size makes them difficult to store.
There are three species under the family Molidae: Mola mola, Mola alexandrini, and Mola tecta.
Mola mola is the most common known ocean sunfish and was found in 1758 and Mola alexandrini (also called Mola ramsayi) was found 81 years afterward. In 1883, Mola alexandrini was found. In comparison to its two relatives, Mola tecta was found recently in 2014. Ten years before Mola tecta was officially named in 2014, the Japanese researchers found out that there is a new Mola species based on the genetic information they obtained from the Australian water. However, they were not able to obtain more information about this new Mola species and they did not know exactly what this Mola species looked like. According to Nyegaard, the first person who described Mola tecta, the Mola tecta are hard to study because they are hard to find and their huge size makes them difficult to store.
Mola tecta