Related Clues:

• Trawled
• Fished for shrimp
• Fished with large net dragged along bottom of sea
• The growth grew up and led to its being a drag
• Added to one's net income?
• Fished, in a way
• Used a net at sea
• Fished for flounder, say
• Looked for a school, perhaps
• Netted, in a way