Rabbi Kaganoff: “Obviously, I am not the first one to note these difficulties with the process of extracting dye from Murex trunculus. However, the responses I have seen to answer these questions are tenuous. It should also be noted that the descriptions used by Chazal to identify the chilazon are not a very smooth fit to Murex trunculus.”
The only thing tenuous is to do your research and then you will see that b’mechlas toraso Rabbi Kaganoff is incorrect.