University of Maryland Center for Environmental ScienceHorn Point Oyster Hatchery

Oyster Larvae

Mature oyster larvae may be purchased to be introduced into your own setting system, so that you can produce your own spat-on-shell/seed.  These spat can be used for a variety of purposes including growing for out-planting  or for the half shell market.

Oyster Larvae Sales

To place an order for oyster larvae please contact Stephanie Alexander (UMCES HPL) at (410)221-8310 or, or ORP at (410)990-4970. Oyster larvae are typically sold by the million but smaller orders may, at times, be accommodated.


The time it will take for your order to be ready will vary, but the hatchery will try to accommodate reasonable setting schedules. Custom spawns may be subject to a non-refundable 50% deposit (product price only, excludes shipping etc.) when the order is placed. Any spawn requiring specific broodstock or ploidy manipulation are considered custom spawns. Custom spawns will only be produced in a limited time frame. Payments can be made to UMCES HPL by check or to ORP by credit card, check, or money order. Cash will not be accepted. All sales MUST BE PAID IN FULL before product will be released/shipped. Personal checks will not be accepted for orders over $500 without prior approval. A certified check, money order, or credit card is required.

Orders for Pick-up

Once notice is given that your larvae order is ready, you will have 48 hours to pick up your order. If pick-up is not made within those 48 hours, you will forfeit your order and product availability will not be guaranteed. Orders MUST BE PAID IN FULL AT TIME OF PICK-UP.

Orders for Delivery

Once notice is given that your larvae order is ready, you will be given a total balance due that includes product and shipping fees. Please mail your payment to UMCES HPL or ORP. Once full payment is received, a hatchery staff member will assist with scheduling a shipment of your order via Fed Ex. You will have 48 hours in which to schedule shipping of your order. Failure to schedule/receive shipment within this time frame could delay your order and product availability is not guaranteed. We do not ship on Fridays or weekends.

After the shipment is complete, you will receive a shipping invoice from FedEx; it is solely the recipient’s responsibility to pay this invoice.


In the event that the facility is unable to fulfill your order, you will be refunded your deposit (if applicable). This can take up to 6-8 weeks to process.

Eyed Larvae (Cost per million)

Diploid Wild Diploid Disease Resistant* Triploid Disease Resistant**
Eyed Larvae $225 $270 $300

* Diploid Disease Resistant are selectively bred, disease-resistant oysters made or sold under license from Virginia Institute of Marine Science Aquaculture Center
**Triploid Disease Resistant are natural triploids produced under license from 4Cs Breeding Technologies, Inc.