Fresh fish has firm flesh. After gently pressing your finger on a piece of fish, the flesh should spring back immediately. If it does not, or if the fish feels mushy to the touch, it is not fresh and should not be eaten.
Why is my sashimi mushy?
Mushy Nori is an indicator that the sushi has been sitting out for too long and has taken on moisture from the rice.
What is the texture of sashimi?
It is chewy and almost "gummy". The Japanese like to have a variety of textures when they eat sashimi. Ika has a similar texture to octopus, but more it is more slippery and smooth. People love tako and ika in Japanese mostly for the texture they provide.