Related Clues:

• They're crammed in cans
• Catch crammed in a can
• Bluefin of the sea
• Sandwich filler, sometimes
• Kind of melt
• Charlie of commercial fame, for one
• Fish in a crowded-subway metaphor
• Main ingredient in tekka maki
• Deli staple
• Bluefin or bigeye
• Kind of salad or sandwich
• Bumble Bee food
• Bluefin
• Skipjack or bluefin, e.g.
• ____ melt