Sushi(すし, 寿司, 鮨) is a Japanese dish consisting of cooked vinegar rice(鮨飯 sushi-meshi) combined with other ingredients (ネタneta), seafood, vegetables and sometimes tropical fruits.
The ingredients in sushi provide a strong taste in the sushi, but the most common ingredient added in sushi is rice.
Sushi can be prepared with either brown rice or white rice. It is often prepared with raw seafood, but some restaurants also served cooked ingredients and sometimes are vegetarian.
Raw fish or other proteins served without rice is called "sashimi".
Sushi is often served with pickled ginger ガリ (gari), wasabi, and soy sauce.
Here are a few pictures of sushi: