The fish was probably pecking at the Algae on it.
May 17, 2023 #21 dadnjesse Valuable Member Review score +0 /0 /-0 View Badges Joined Jan 9, 2019 Messages 1,322 Reaction score 946 Review score +0 /0 /-0 Location New Hampshire Rating - 0% 0 0 0 The fish was probably pecking at the Algae on it.