List: word usually written using kana alone

usually written using kana alone  noun  noun (generic) 

• Pteria brevialata (species of wing oyster)

usually written using kana alone  noun  noun (generic) 

• black-lip pearl oyster (Pinctada margaritifera)

usually written using kana alone  noun  noun (generic) 

• ass's ear abalone (Haliotis asinina), donkey's ear abalone

usually written using kana alone  noun  noun (generic) 

• mirugai clam (Tresus keenae, species of gaper clam)

usually written using kana alone  noun  noun (generic) 

• Japanese geoduck (Panopea japonica)

usually written using kana alone  noun  noun (generic) 

• mirugai clam (Tresus keenae, species of gaper clam)

usually written using kana alone  noun  noun (generic) 

• Pinna bicolor (species of pen shell)

usually written using kana alone  noun  noun (generic) 

• trigoniid (any clam of family Trigoniidae)

usually written using kana alone  noun  noun (generic) 

• Unio douglasiae (species of freshwater mussel)

usually written using kana alone  noun  noun (generic) 

• dilate piddock (Barnea dilatata)