List: word usually written using kana alone

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)

usually written using kana alone  noun  noun (generic) 

• whalebone, baleen

usually written using kana alone  noun  noun (generic) 

• baleen whale, whalebone whale, mysticete

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

• beaked whale (esp. Cuvier's beaked whale, Ziphius cavirostris)

irregular reading  usually written using kana alone  noun  noun (generic) 

• Stejneger's beaked whale (Mesoplodon stejnegeri)