Bottom Feeders

Like fish, bottom feeders can be harvested for coins and experience. Unlike fish, bottom feeders do not need to be fed and do not die.

Seen in Little Rock Pool Help (Will my bottom feeders die?)

Blue Crab
Seen In Echos Rock Pool

Comparison
The following table compares the harvest values and experience rewarded for each species of bottom feeder.

Purchasable
Note 1: Profit, Experience (XP) and Experience Points Per Hour (XPPH) do not include the inital purchase price or XP, as you are not required to purchase bottom feeder every harvest.
 * CPH = Coins Per Hour
 * ROI = Return on Investment. The time it takes to make back the coin spent.
 * XP = Experience (Per Harvest)
 * XPPH = Experience Points Per Hour

Bottom Feeder Limits
The rock pool begins with a limit of 2 bottom feeders. Each Expansion to your pool increases this limit by 2 for a current maximum of 8 bottom feeders.