Via the spells true polymorph and shapechange, it is possible for any qualified recipient to gain a very accurate form of an aboleth. (A CR or level of 10+ is required to use true polymorph this way - though shapechange only requires one to cast the spell.)
The description of the aboleth in the Monster Manual (page 14) suggests that all of these creatures have an ancestral-genetic memory of every previous aboleth that ever existed. The description does not say this directly, but does state that they have 'flawless memories' and will 'pass on their knowledge and experience from generation to generation' - without stating how this is done.
Hence my question:
Does taking the form of an aboleth allow a character to gain their genetic memory?
If so, any wizard, bard or sorcerer with access to either of these two spells (or other similarly accurate shape-changing magic) could have rapid, accurate, and powerful research capacities.