If a certain species of fish(or certain size of said species) are hanging out at a certain depth, can I assume the fish I mark on the graph, at the same depth, at other locations, on the same body of water, are the same species or size of said species I found in the first location? Basically I caught fish 16ft down in 16ft of water, leave and mark fish 16ft down in 25fow and 16ft down in 50+fow what are the chances of those fish being the same as the first location? I marked fish down to 35ft, but was also unable to catch the fish suspended @ 16ft in the deeper water. There was no thermocline on the graph and I assume there wasn't one anyway because of the fish marked deeper. I'm making an assumption that the water temp and or bait were ideal at 16ft on this particular day on this particular body of water. I'm relatively new to deep water fishing, and I'll admit I wasn't targeting bass, but fish are fish....right?      

Fish are fish but not necessarily those fish are bass.

sloenzp---- in my experience (limited) once you mark fish at a given depth and catch them at that depth then you should spend the rest of the day at that depth or very close to it.... depending on the normal factors water temp, wind, structure ect.

suspended fish are the hardest to catch... fish within 2-3 foot of the bottom or on the bottom are catchable IMO and in my readings.

I get some awfully strange looks by my back seaters when I mark suspended fish, let's say 16' & move to structure in 16' & start catching bass.

There is the thermocline and what is called the life zone, the depth baitfish and predator fish are located. Predators near structure are a lot more catchable then suspended (inactive) fish off structure. If you are determined the life zone is16' fish near that depth where bass are known to feed.

We make a lot of effort to determine where active bass maybe located, when you find the right depth, fish there!

Tom