Morrissa arrived at the RSPCA's Danaher Animal Home in Essex in April and staff have so far struggled to find her a new owner
Just like the "saggy, loose at the seams" 1970s children's TV character, Matilda is showing signs of wear and tear.
The RSPCA said it has sent an officer to help the animal.
The fish would have suffered a slow death, the RSPCA said.
Paddy was discovered neglected and alone in Sprotbrough, Doncaster, in January by the RSPCA.
The three puppies were dumped at a vets practice in Halifax a week apart.
Video of Snoop the dog’s abandonment at a roadside has been watched by millions of people.
From a three-foot-long scorpion to a hamster being stuck in a pipe here are the RSPCA's most unsual rescues for 2018.
The curious pet was uninjured following the rescue in Kidderminster, Worcestershire.
The pet was trapped between a wall and a fence in Swansea for three hours.