Newhaven Coastguard was alerted to the incident on Saturday morning (January 15).
A Coastguard incident report, on social media, said the Newhaven team was called to a report of a dog stuck on a groyne and cut off by the tide.at Peacehaven.
The statement read: "Two rescue swimmers were deployed to secure and rescue the dog.
"The owners [were] very grateful to have their pet rescued."
The Coastguard said the owner did 'exactly the correct thing', in calling 999 and asking for the Coastguard, adding: "Never attempt self rescue.
"[In a] coastal emergency, dial 999 and ask for Coastguard."
Newhaven Coastguard's second call-out of the day was to assist four people on a boat, which had broken down and drifted ashore at Tide Mills.
A spokesperson said: "Once the persons on board were brought ashore safety the vessel was secured and assistance made for a recovery refloat on tonight's tide."
In an update on Saturday evening, the Coastguard said the vessel had safely re-floated.
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