Yeah I know why its in place for sellers and collectors and I think its nice for someone well versed in pleco, but for a beginner like me I get pretty confused. I remember two notable instances where the L-number naming scheme made for a pretty interesting interaction. 1. When I asked a storekeeper pleco to recommend me a pleco for my tank size and he goes on with number after numbers and I was there like hmmmm since when fish got numbers in their names? (at that point I have only ever bought common plecos for ponds). 2. I saw a beautiful black pleco online and was trying to find out what species it was and since it doesn't have any distinct marking I just went to Wikipedia and starts googling all the numbers until I found the right one haha. Well I'm sure its only problems for a minority but I feel that an extra category like base colour-L- number would make it much easier.An L number is actually quite nice to have. The common names doesn’t always get you the pleco you are looking for, but if you have the L number your more than likely going to get what you want.
with the term zebra pleco you could be looking at L046 the black and white known striped pleco, L129 the black and yellow squiggly lined Columbia’s pleco, l127 black and yellow spotty pleco, L173 black and white squiggly lined pleco, and I’m sure there are more that go by the name zebra. So having the numbers helps greatly here.
you also don’t need to remember every l number and what the pleco looks like bc I can assure you that there are so many plecos that even if people used common names or scientific names you would still have to go google what they look like