How do ostariophysan feeding habits differ among species?

Ostariophysans exhibit a remarkable diversity of feeding habits, supported by a wide range of adaptations in mouth structure and tooth types. These habits vary significantly across species:1

• Filter Feeders: Some cyprinids, such as Notropis atherinoides, utilize highly developed gill rakers to strain phytoplankton from the water.1
• Algae Scrapers: Species in families like Gyrinocheilidae, Balitoridae, and Loricariidae possess suckerlike lips to scrape algae from rocks, often having minute or absent teeth.1
• Bottom Feeders: Many catfishes, suckers, knifefishes, and some minnows feed by sucking up mud and bottom debris, extracting nutrients, and ejecting the residue.1
• Carnivores and Predators: Small carnivorous species consume invertebrates such as insect larvae, crustaceans, worms, and mollusks. At the top of the food chain are voracious predators like piranhas, which use powerful jaws and sharp teeth to hunt, and the tigerfish, a large, fast predator.1
• Parasites: A few species, such as certain trichomycterid catfishes, exhibit parasitic habits by attaching to the gills of other fish to feed on their blood.1