Related Clues:

• Rush-hour subway rider, figuratively
• Short way one fillets normal fish
• Subject of John McPhee's book 'The Founding Fish'
• Herring cousin
• Irish race back first three characters from 25 across from point in the sea
• Fish said to be named for a Mediterranean island
• Menhaden's cousin
• Herring prized for its roe
• One in a tight squeeze
• Toothless fish
• Metaphor for density
• Source of valuable eggs
• This fish, blue when cooked, could be undesirable
• Kind of roe
• Fish sometimes used to make dashi