The most important crops are rice and potatoes, while other important agricultural products are beans, maize and soya.
The Marotandrano Reserve is a wildlife reserve in Mandritsara, Mahajanga, Madagascar.
Ptychochromis insolitus, also known as the Mangarahara cichlid, is a species of cichlid endemic to the Amboaboa and Mangarahara Rivers near Mandritsara in northern Madagascar.