It is poo and will drop off eventually.
I would assume that the fish are not "line bred" in which case the white fish could be either a throw back or an oddball.
lower tube coming out of evaporator (inside black thing on firewall) remove line coming from condenser. It is inside there.
White to neutral, black to line, gray to fan and purple to fan.
the line fish.
Haddock
If the fish is more red than orange it could be a red wag swordtail or even a platy. well... male- all orange with a line of black on the under side of the tale is a xiphophorus helleri swordtail from the southern mexico, Guatemala
"The Man in Black", "Folsom Prison Bluies", "I Walk the Line", "Ring of Fire", "Sunday Morning Coming Down"
Black Line happened in 1830.
if it is loose fish cant hold on and the line will not pull the fish in.
Many line of
The lateral line belongs to the lateral line system. This helps to stream line fish in water and to keep them afloat.
Although the red (positive) and black (negative) are common variations, positive usually comes with a line (e.g gray with black or white line)