Mohi is indeed the Farsi word for fish...
I note the use of stone facings at Sohar and the use of bricks..see #43.
Icoman have a great website at
http://www.klm-mra.be/icomam/downloads/issue07.pdf where a number of Forts are illustrated and details of cannon such as this one below with the Portuguese emblem and crown above. I note also at # 13 earlier ... The provenance is on the Icoman site.
The almost eaten away barrel is on the beach in front of the Fort at Hormuz.