Moby Big.

What's known

Here's what's meant to be true and not.

What we actually know

• Moby Big is a plain Psilocybe cubensis. The name refers to a hobbyist-bred strain, not a separate species or a wild collection.
• It is reportedly a hybrid: the leucistic Moby Dick crossed with the well-known B+, then back-crossed and settled. That makes it a hybrid of a hybrid.
• Moby Dick, one of its reputed parents, is a leucistic strain (itself said to descend from Albino A+ crossed with Golden Teacher), which is why Moby Big tends to lean pale and frosted in the cap.
• Because it is leucistic and not albino, the body loses pigment but the spores do not. It still drops a dark purplish-brown print, which is unusual for such a pale-looking mushroom.
• It is a relatively modern vendor name with very little documented, verifiable history. Most of what circulates traces back to the seller's own catalogue copy.

What the community says

• The strain is widely attributed to MushMush, a Dutch spore vendor also linked to the early releases of White Rabbit and to Moby Dick itself. Treat the specific breeding claims as their own account rather than independently verified record.
• The standard story is that Moby Dick and B+ were crossed, back-crossed and settled to fix the look. That is a plausible hobbyist breeding path, but no public lab pedigree backs the exact steps.
• Some sellers bill it as a notably strong cube on the strength of its lineage. There is no reliable testing behind that ranking, and as the saying goes, a cube is a cube.
• The name is almost certainly a simple play on its parents: the Moby of Moby Dick plus the Big of a chunky fruitbody, or a nod to B+. Nobody has documented an official explanation, so the etymology is guesswork.
• Through Moby Dick and Albino A+, its family tree is sometimes traced back to the same anonymous Mr. G associated with B+ folklore. That is a fun bit of lineage gossip, not established fact.

Where it came from

Moby Big is one of those names that sounds like it has a long pedigree and then, the moment you start pulling threads, turns out to be quite young and quite undocumented. By most accounts it is a modern release attributed to MushMush, a Dutch spore vendor better known for Moby Dick and for the early White Rabbit drops. The widely repeated story is that someone took the ghost-pale Moby Dick, crossed it with the dependable old B+, then back-crossed and settled the result until the look held true. It is a believable hobbyist breeding path, but almost everything written about it traces back to seller copy rather than any independent record.

What makes the lineage genuinely interesting is that Moby Big is a hybrid of a hybrid. Moby Dick is itself reportedly Albino A+ crossed with Golden Teacher, which is why it carries that frosted, low-pigment look. Stir in B+, the big easygoing classic, and you get a mushroom that leans pale and chunky at once. Follow the family tree far enough and, through Albino A+, you even bump into the same anonymous Mr. G who haunts B+ folklore, though that connection is gossip rather than gospel.

The version is that Moby Big is a recent vendor strain with a thin paper trail. The breeding story is plausible and widely repeated, but it is the seller's account, not documented history.

What to expect at the scope

Here is the part collectors actually care about. Moby Dick, and the Moby Big that follows it, are leucistic rather than true albino. Leucistic means the fruitbody loses most of its pigment, going pale to faintly blue, while the spores keep their colour. So despite a body that can look bleached or frosted, Moby Big still drops a dark purplish-brown print, which is the opposite of what a true albino does. For anyone putting it under glass, that is good news: dark, well-normally coloured spores are far easier to find and study than the faint, near-transparent spores an albino strain tends to give up.