Some articles on mahisawar:

Mahasthangarh - Anecdote
... There is a local legend that Shah Sultan Balkhi Mahisawar arrived at Pundravardhana in the garb of a fakir (mystic holy pedlar of Islamic philosophy) riding a fish ... (Mahisawar is Sanskrit-Persian word meaning a person who rides a fish) ... Mahisawar requested Parasuram for a piece of land to spread his prayer mat on which he could pray ...