Seaberry (Hippophae rhamnoides) is a very hardy nitrogen fixing thorny shrub that produces small orange berries that are considered a "superfood". Wikipedia entry for Seaberry.
Seaberry plants come in males and females, and these are unsexed seedlings, so plant two or more to produce fruit.
These 3rd year seedlings range in height from 2 to 3 feet.
Photo Credit: AnRo0002, CC0, via Wikimedia Commons