Kaeneus the son of Koronus from Gortyn was one of two Argonauts that bore the name (the other being the child of Elatus and Hippea).  The exact amount of Kaeneus' involvement in the Quest for the Golden Fleece is unknown because he is onlly mentioned by name in the part  where the Argonauts assemble.

Ancient Text

"Another Caeneus, son of Coronus, from Gortyn"