I believe sense of smell will vary between fish species. For instance, fish that are more common in turbid water or hunt at night will probably have a more developed sense of smell than fish that sight hunt in the daytime.

Don't rule out vibrations and the lateral line in fish.

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).