The best replacement for clams is mussels.

The best alternatives to clams are rated as following:
★★★★★  mussels
★★★★★  oysters
★  muscles
★  oysters and scallops
★  scallops
★  cockles
★  steamers
★  ocean clams
★  pipis
★  little neck
★  littleneck clams
★  quahogs
  little neck clams
  oysters have pearls
  top neck
  sea clams
  chopped clams
  fresh clams
  manila clams
  mossles
  mahogany clams
  cherrystone clams
  brachiopods
  geoduck clams
  oyster

Your alternative for clams is not listed? Suggest!
Speaking about clams, one probably shouldn't forget about black bean sauce.

Other search terms related to clams and their ratings are:
★★★★★ black bean sauce
★★★ chorizo
★★ white wine sauce
★★ linguine
★ linguine recipe
★ red sauce
★ white sauce
★ linguine giada
★ spaghetti
linguini
white wine and garlic
You have in mind a companion for clams and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of clams in all years. Click on graph for more.
clams
mussels
oysters