| Osteospermum |
藍眼菊 |
| Ostichthys japonicus (Cuvier & Valenciennes) |
金鱗魚 |
| Ostracion meleagris Shaw |
細點鎧魨 |
| Ostracion tuberculatus Linnaeus |
粒突鎧魨 |
| Ostraciontidae |
鎧魨科、箱魨科 |
| Ostrea |
牡蠣 |
| Ostrea gigas |
長牡蠣 |
| Ostrea plicatula |
褶牡蠣 |
| Ostrea rivularis |
近江牡蠣 |
| Ostrea talienwhanensis |
大連灣牡蠣 |
| Ostreidae |
牡蠣科 |
| Other Conservation-Deserving Wildlife |
其他應予保育之野生動物 |
| other eels：hagfishes (Myxinidae) ; snake eels (congridae) / conger eels (ophichthidae) |
其它海水鰻、盲鰻、蛇鰻、糯鰻、臭腥鰻、沙鰻、海鰻等 |
| Otolith character |
耳石特性 |
| Otter boards |
網板 |
| Otter Trawl |
單船拖網 |
| Outboard motor |
船外機 |
| Outboard propulsion system |
船外推進莊置 |
| outflow hydrograph |
出流歷線 |
| outside working circle (O/W) protection forest |
區外保安林 |
