[CJhaughey]

Sushi is actually rice with other bits and pieces not necessarily fish, Sashimi is raw fish.
Even if you don't eat fish you can still get vegetarian sushi.

[niallam]

There is very little white fish used in sushi really, king/tiger/vanamei prawns, tuna and salmon are what you get most in Ireland. Sashimi grade tuna has been frozen once to kill parasites that may be present, salmon is farmed as are the prawns.
Traditionally Sashimi meant the process of sticking a spike through the fish's head once aboard the boat to preserve the flesh better.

[CJhaughey]

Originally Posted by niallam

Traditionally Sashimi meant the process of sticking a spike through the fish's head once aboard the boat to preserve the flesh better.

Ikijime is the process of killing the fish by crushing the brain, usually with a spike
The way the Japanese kill tuna is they cut the head off and insert a length of monofilament into the spine to kill the nerve activity, that can cause the body of the fish to heat from twitching.

[niallam]

Originally Posted by CJhaughey

Ikijime is the process of killing the fish by crushing the brain, usually with a spike

Very true. The word sashimi means "pierced body", sashimi is what i'd use to describe raw fish suitable for eating because some sushi has no fish in it...
Killing the fish quickly stops lactic acid building up and preserves the fish better.