A sea dwelling mutation that feed on Mutant Giant Squid and their captured prey until Zilla Jr. killed them all. He/she is probably a mutant cuttlefish.
Godzilla: The Series
C-Rex plays homage to Ebirah, many people are also compare it to Anguirus do to being the first monster the American Godzilla fights. Oddly enough it seems that the newer kaiju Clover(the "Cloverfield" monster) may be a homage to him along with several other monsters from the series.