Acidic hyaluronidase activity is present in mouse sperm and is reduced in the absence of SPAM1: evidence for a role for hyaluronidase 3 in mouse and human sperm.
Reese KL, Aravindan RG, Griffiths GS, Shao M, Wang Y, Galileo DS, Atmuri V, Triggs-Raine BL, Martin-Deleon PA. Mol Reprod Dev. 2010 Sep; 77(9):759-72.