Crustaceans are organisms under the subphylum crustacea, encompassing over 50,000 species. Their eating habits are not all the same, so you can not make a general statement.
Mantis shrimp are carnivorous hunters, copepods are often herbivorous, caridina shrimp are often omnivorous scavangers... It would be better to refine the question further.
I wish I could give you a reliable general statement, but I don't know the 50,000 species, haha. Sorry!
it depends on what dolphin it is...
carnivores they eat stuff like krill and zooplankton
Swordfish are meat eaters (carnivores). They eat animals such as squid, octopus, fish, and crustaceans.
They are omnivores, so they eat both meat and plants.
They can be all three; it depends on the protist.
Yes, arapaimas eat crustaceans and fish for the most part.
Seals are carnivores. They primarily feed on fish, squid, and crustaceans.
No, belugas are carnivores. They primarily feed on fish, squid, and crustaceans in their diet.
Mudpuppies are carnivores. They feed on worms, insects, crustaceans, fish, etc.
Dolphins are carnivores, actively preying on a wide variety of fish, squid, and crustaceans such as shrimp.
A seahorse is a fish, and feeds on small floating crustaceans, or crustaceans crawling on the bottom. So is a carnivore.
Yes, stingrays are carnivores. They mainly feed on small fish, crustaceans, and mollusks that live on the ocean floor. They use their flattened bodies to efficiently glide through the water in search of prey.