They are smaller, but most marine species don’t do particularly well on brine shrimp alone. They lack a lot of essential fatty acids and typically leads to what is known as sudden fright syndrome. They die of shock easily. The typical recommendation is to gut load them to improve the HUFA profile.
Jen over at Colchester Pets was able to raise some peppermint shrimp to adulthood on brine shrimp alone, though the survival rate wasn’t great, but it is an amazing start.
Copepod nauplii and ciliates (and a yet undetermined source that is filling in the gaps) are more nutritious for the larvae. They avoid the explicit need to gut load while providing a better balanced diet. First foods has been the biggest hurdle to being able to successfully breed at home without it being extremely labor and resource intensive seeing as we don’t typically have access to the same resources as the labs just due to differences in scale and how that effects overall cost.
