Otter, Orca, Octopus.
Ocean perch and Oregon chub are sea animals that begin with the letter o. Lemon Shark and Lake Trout are sea animals that begin with the letter l.
Sea of Okhotsk
Olive Ridley sea turtle
Otter
Ostrich
Ostrich Otter
Some words that start with the letter O are:oceanOddOdeofoffOfficeogreoldOliveOnoneOpalOppositeorOrangeorboreganoorganismorgasmorigamiotherotteroughtOxymoronoval
Dolphin
Yes, owl and octopus both start with the letter O.
Okapi
'UNICORN'
octopus