Yellowfin tuna and shrimp

I liked the tuna salad so well I had to do it again. But with frozen tuna this time, not tinned. And with shrimp. And with olive oil and lemon juice instead of mayonnaise. 

I realized something. It's the celery that weeps its liquid and turns the mayonnaise watery. So this time the celery got the same salt treatment as the onion. Both together. They both released a lot of liquid. 

I didn't want to use the last of my pickles so I poured pickle juice into this. So after all that liquid extraction I add more back to it.