He had initially denied stealing the fish from the aquarium in La Vallette, but later changed his plea.

Passing sentence, Judge Philip Robey said his acts had been "mean to the aquarium and anglers".

Clark's advocate, Sam Maindonald, said her client regretted stealing the fish and that he was at a loss to explain why he had done it.

As well as community service, Clark was discharged on condition of taking an oath of good behaviour for two years.

He faces a jail term if he breaks the terms of the discharge.