Yep. Most species of cultured finfish feed like that for first feeding. They are attracted to the movement. That's why I said to get a rotifer culture going or an Artemia
culture established. IMO
, larval brine shrimp would be great. They are nutritionally acceptable. Adult Artemia
brine shrimp OTOH
are nutritionally empty for all intents and purposes, but they can be used to incite a feeding response.
When you start algal and rotifer cultures, make very sure that you don't let the rotifer culture contaminate the algal culture. This may sound like a no-brainer, but it is more likely than you may think. Use separate glassware, filtration, and utensils to deal with each culture. Contamination of your algal culture with a few rotifers can result in the destruction of the algal culture. Where I work, we have huge cylindrical tanks with wall lighting for algal and rotifer cultures. We also have separate equipment for both cultures. We use rotifers for larval rearing experiments with Pacific white shrimp (Litopenaeus vannamei
Another thing that you should seriously consider is the timing of the larval hatch and collection. You have to time it right so you can collect them. Some aquaculturists use a flashlight and beaker. You can shine the light on the surface of the water and the larvae will flock to the light...it's called a phototactic response. With the larvae at the surface of the water, you can CAREFULLY skim them off in a 250 mL beaker or similar piece of glassware.