1. Algae and Detritus: Spotfish often graze on algae that grows on rocks, seaweeds, and other submerged surfaces. They also consume organic detritus, which consists of dead or decaying plant and animal materials found in the water.
2. Small Invertebrates: Spotfish commonly feed on small invertebrates such as crustaceans, including amphipods, cumaceans, isopods, and shrimp. They also eat marine worms, such as polychaetes, along with mollusks like clams, mussels, and squid.
3. Insects: Spotfish may consume various insects that fall or fly near the water's surface. These can include flies, midges, moths, and other small insects.
4. Fish Larvae: Spotfish sometimes prey on the larvae of other fish, including menhaden, anchovies, and silversides. They actively seek out these small, immature fish as a valuable source of nutrients.
5. Zooplankton: Spotfish may also feed on zooplankton, which are tiny aquatic animals like copepods, larval crustaceans, and fish eggs. These microscopic organisms are often found in large numbers and provide an important part of the spotfish's diet.
Spotfish are generally opportunistic feeders and will consume whatever food is readily available in their environment. Their diet can vary depending on factors such as the season, location, and availability of specific food sources. They primarily feed during the day and are known for their scavenging behavior, searching for food both on the water's surface and along the bottom of their habitats.