This is the 7158th most frequent Japanese word.
ワラスボ
"ワラスボ" refers to the Japanese warasubo fish (species: *Lycodes matsushimae*), an eel-like marine creature native to Japan, often considered grotesque in appearance.
Here, 'ワラスボ' (warasubo) is introduced as a noun, identifying the specific entity name of this rare fish.
ワラスボは珍しい魚です。
The warasubo is a rare fish.
In this sentence, 'ワラスボ' (warasubo) functions as the object of the verb '食べた' (have eaten), asking if someone has eaten the fish named warasubo.
ワラスボを食べたことがありますか。
Have you ever eaten warasubo?
Here, 'ワラスボ' (warasubo) is used within the expression 'について', which means 'about', to indicate the topic being discussed (warasubo).