List: word usually written using kana alone

usually written using kana alone  noun  noun (generic) 

• ringed seal (Pusa hispida)

usually written using kana alone  noun  noun (generic) 

• short-beaked common dolphin (Delphinus delphis)

usually written using kana alone  noun  noun (generic) 

• bottlenose dolphin, bottlenosed dolphin (Tursiops truncatus)

usually written using kana alone  rare term  noun  noun (generic) 

• bighorn sheep (Ovis canadensis)

usually written using kana alone  noun  noun (generic) 

• Dall's porpoise (Phocoenoides dalli)

usually written using kana alone  noun  noun (generic) 

• Pacific white-sided dolphin (Lagenorhynchus obliquidens)

usually written using kana alone  noun  noun (generic) 

• striped dolphin (Stenella coeruleoalba)

rarely used kanji form  usually written using kana alone  noun  noun (generic) 

• larger whales of family Delphinidae (esp. the pilot whales or blackfish)

usually written using kana alone  noun  noun (generic) 

• short-finned pilot whale (Globicephala macrorhyncus)

usually written using kana alone  noun  noun (generic) 

• long-finned pilot whale (Globicephala melas)