Possible Clues:

• Famously feisty fish
• Toothy Amazon fish
• Word from a Brazilian language for ''tooth fish''
• Fish from Asian country served in public house area
• Fierce swimmer Private Investigator fled — that’s funny!
• Dad bags country house's top fish
• Swimmer to stay away from
• Detective finds most of 3 down and a fair amount of hake - a ferocious fish
• Greek character managed hotel by a type of school that's particular dangerous?
• Small carnivorous freshwater fish