The title story appeared sequentially (in black & white) in Le Parisien Libéré, and only the accompanying story Les petits formats was serialised in Spirou magazine as well,[clarification needed] before both were published in a hardcover album in 1964.

In Spirou et les hommes-bulles, memories of Le repaire de la murène are invoked as John Helena, "the Moray", escapes from captivity, and Spirou, Fantasio and the Count suspect he is going after the gold that is still in the wreckage of Le Discret.

A sudden trend of mini-submarine sabotage prompts the heroes to investigate, and the mystery becomes no more clear when Helena is discovered barely conscious, with gold, feebly warning of an attack by the "Bubble Men".

In Les Petits Formats, Marsupilami playfully exposes Fantasio's unused film, forcing him to go to Mr. Flashback's photo store to buy replacements.

In comparison to its "prequel", Le repaire de la murène, hailed for its rich and atmospheric colour-use, it is criticized for falling short in this respect, as well as other, more typical, sequel disgruntlement.