This is the 7138th most frequent Japanese word.
ロブスター
Lobster (a type of large marine crustacean).
Here, 'ロブスター' is used as a noun to refer to the marine animal, contextualized as a type of seafood.
ロブスターは海の幸の一つです。
A lobster is one of the delicacies from the sea.
In this sentence, 'ロブスター' refers to the lobster as a food item consumed during a meal.
昨日の夕食でロブスターを食べました。
I ate lobster for dinner yesterday.
The term 'ロブスター' here signifies the primary ingredient in the dishes the subject specializes in preparing.