Police are investigating the theft of up to 100 killifish from a garage in the village of Great Waldingfield at the weekend.
The outbuilding in Heath Estate was broken into some time between 11pm on Friday and 9am on Saturday morning.
The report doesn't give the species of fish stolen, but they are described as being around 5cm/2" in length and having a bright green or blue background.
Anyone with information is asked to contact Sudbury Police on 101 or Crimestoppers on 0800 555111.
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