What kind of freshwater fish is puffy and round colored dark brown with small white spots attaches itself to things?

Here's why:

* Puffy and Round: Sculpins are known for their rounded, somewhat puffy bodies.

* Dark Brown with Small White Spots: This is a common coloration for many sculpin species.

* Attaches Itself to Things: Sculpins often use their pectoral fins (which are large and fan-like) to anchor themselves to rocks, plants, or other objects in their environment.

There are many different types of sculpins, so the exact species would depend on the location you saw it.

Let me know if you have more details about its size, location, or any other features, and I might be able to narrow it down further.