What is a group of stingrays called?

Search: group of stingrays name

Why: I'm still in Florida, y'all. Today, Sadie and Meggan and I went on WaveRunners to look for dolphins. We saw lots of dolphins, and we also saw lots of stingrays. They looked like they were flapping their wings. They were traveling in packs. What are they called? A school? A flock? A fesnyng?

Answer: Who knows! I see these names:

• Draught!
• Drift!
• Scale!
• School!
• Shaol!
• Fever!
  

Source: Yahoo! Answers, Wikipedia,

The More You Know: The word "school" (like 'school of fish') may be a corruption of the word "shoal" - like Mussel Shoals. Or it may have come from somewhere else:

School of fish was borrowed from Middle Dutch schōle, "troop, group." This went back to West Germanic skulo, which may have been derived from the base skel-, skul- "split, divide" (source also of English scale, scalp, shell, etc); if so, it would mean etymologically a ‘division’.

Maybe 'shoal' came from that, too. Who knows.