List: word usually written using kana alone

JLPT N1  usually written using kana alone  expression 

• possibly, maybe, perhaps

usually written using kana alone  noun  noun (generic) 

• longhorn cowfish (Lactoria cornuta)

usually written using kana alone  noun  noun (generic) 

• spotted eagle ray (Aetobatus narinari)

usually written using kana alone  noun  noun (generic) 

• barfin flounder (Verasper moseri)

usually written using kana alone  noun  noun (generic) 

• Fowler's snake eel (Ophichthus erabo)

usually written using kana alone  noun  noun (generic) 

• snubnose brotula, armoured cusk (Hoplobrotula armata)

usually written using kana alone  noun  noun (generic) 

• kitefin shark (Dalatias licha), seal shark

usually written using kana alone  noun  noun (generic) 

• bighead carp (Aristichthys nobilis)

usually written using kana alone  noun  noun (generic) 

• silver carp, bighead carp

usually written using kana alone  noun  noun (generic) 

• Atlantic cod (Gadus morhua)