Depending on the package size there are 3 options that are most economical sense.
Padded Flat Rate USPS Priority Mail Envelope will hold 1 pair of adults or 6 fry.
Medium Flat Rate USPS Priority Mail will hold 6 pairs of young adults or 24 fry.
Large Flat Rate USPS Priority Mail 9 pairs of young adults or 36 fry.
It really depends more on the your perspective which is usually based visually on size rather than age. Approximately any swordtails less than ¾ “ would be perceived as fry and any larger than that would be considered Juvies, once they are mature enough to begin or start dropping fry Young Adult Size and Larger Fish would be considered Breeder Show Stock.
Hi, Thanks for the inquiry! Welcome to online livefish and plant purchasing. I try to make this as similar to purchasing anything else you have purchased online with a conventional shopping cart. You can either choose my buy now button located in my listing and be directed to Paypal and use your Paypal account or a credit or debit card to check out. The other method is to use the Aquabid checkout system which sends an email to me letting me know you’ve purchased and then wait for a Paypal request for payment. You can also purchase the same items off of my website www.livefins.com . The choice is yours, whenever you are ready to purchase let me know and I can send a package to you on any Saturday, Monday, Tuesday or Wednesday. Some livestock can survive longer than others in transit while living in a box. Some livestock needs to be conditioned a day (small fish) or two (larger fish) before shipping, some can be sent the same day (snails, plants). The main thing we (live fish sellers) try to avoid is extra days sitting in the post office over Sundays as this adds risk to the survival and well-being of whatever you purchase. I welcome any questions you may have that will make this purchase enjoyable and easy!
Kordon Breather Bag Satchels