This works by inverting whaleMassFromLength() using uniroot().
whaleLengthFromMass(M, species = "N. Atl. Right Whale", model = "fortune2012")Whale mass (kg).
A string indicating the whale species
(see whaleMassFromLength() for details).
Character string specifying the model
(see whaleMassFromLength() for details).
Whale length (m).
See whalestrike() for a list of references.
whaleMassFromLength() is the reverse of this.