The peculiar Stacknom’s triplicate hearts have proven to be a little-warranted demand on its energy and water intake, making it perform rather poorly compared to similar flora in its range. However, while competition is fierce on land, it’s markedly less so in the water. A population of Snacknoms were pushed increasingly closer to the sea and have adapted to better suit their current position, eventually accumulating to a point in which these populations split - becoming the distinct Wetnoms.

Where the multiple hearts of the Stacknom are a detriment, here in the warm coastlines of Oofle and Beans they’ve become more advantageous. Apart from photosynthesis, the Wetnom subsists on the varied plankton found in these waters, providing extra nitrogen and energy. To acquire this bounty, one of the Wetnom’s hearts has become a chamber rimmed with four pumping valves; these valves periodically suck in the plankton-rich water, then close up once the flora has its fill. Digestive compounds break down the Wetnom’s catch to be diffused into its xylem. Waste is expelled via the tips of its leaves, far away from being sucked in again. To cope with radioactive catches, this chamber is populated with a species of Nuclear Sunscreen Poopycell immune to Wetnom digestive compounds, shielding from harmful emissions.

Another heart has adapted into a buoyant chamber filled with gas, helping to hoist the Wetnom’s foliage on the water’s surface. The remaining heart functions similarly as with other nomweeds - serving the distribution of nutrients, but can now also expel excess salt. Wetnom foliage is arranged akin to the hour marks of a clock - four with each of its three layers.

Spores are carried off in the wind, but they won't travel far. These spores are dense, and after briefly floating on the water’s surface, sink down to the substrate, hopefully away from its parents. A settled spore will then germinate into a new flora. Wetnoms can also produce clones from runners.

Wetnoms can cohabitate with varieties of poralp, as they both occupy different niches and utilize different photosynthetic compounds.