Excal-heim
Pack Tactics. The shark has advantage on an attack roll against a creature if at least one of the shark's allies is within 5 feet of the creature and the ally isn't incapacitated.
All Breathing. The shark can breathe any non-solid substance.
Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 6 1d8+2 piercing damage. Dive. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 6 1d8+2 piercing + 6 1d8+2 bludgeoning damage. The shark dives down at least 30ft to attack its prey.
Something like "I saw the fins out of the clouds and then just the teeth."
Something like that.