These are the magic organisms that break down fish tissue into nutrients. I very recently became interested in this ancient process of fermentation and am very far from knowledgeable about the process.
Lycan's ( Chernobyl ) could be chocked up as a learning experience.
The liquid has a high concentration of micro organisms ( slime is a dead give away of high microbial count ) and would provide some benefit as a type of lactobacillius culture. Whole carp have provided some nutrients but not in the way desired. Although they will be the gift that keeps on giving.
I would shoot holes in the very bottom of the tote from ALONG ways off, and about January 30th haul it to the dump.
Just my .02$