Sushi
Sushi - Sushi Ingredients (Main) - Roe

Sushi Roe

Most roes used in sushi are prepared by separating them from their casings and either salting them or immersing them in soy sauce and rice wine. Sea urchin are the male and female gonads and they are usually washed in cold salt water to quickly constrict  it so it won't break apart.

Flying Fish Roe Tobiko
Salmon Roe Ikura
Sea Urchin Uni
Smelt Roe Masago