Not in the bestiaries.
“But whaling, Cas,” Gabriel wheedled, as they cast the net out.
Castiel didn’t say anything. He didn’t need to. He just gave his brother a Look.
“Harpoons!” Gabriel went on, cheerfully ignoring the Look. “A whole flotilla of guys, battling God’s mightiest fishes together! Tails the size of houses slamming down into the water, shattering boats and limbs, but not ours because God loves us and you’re too much of a spoilsport to steer close in! Victory, and the sharks going wild for us, and riches from the lords at the monastery to last us a month! And girls, brother dearest, don’t forget the girls.”
“I hadn’t forgotten them,” Castiel said mildly. “You mentioned them two minutes ago. I don’t think Jo appreciated it.”
“Jo never appreciates me.”
“Damn right,” said that lady, up at the tiller. “Maybe if you noticed I’m actually a girl sometime—”
“You’re not a girl,” said Gabriel, with dubious gallantry, tying off his end of the net. “You’re an angel. An angel in fine breeches. Girls need wooing. You need terrified supplicants.”
“You know I’m right. Cas, I’m right aren’t I?”
“Gabriel,” Castiel sighed. “I wish you wouldn’t gabber on while we’re casting. The net’s caught over something again.”
Gabriel leaned precariously over the side and poked at the tangle of strands where they vanished, taut and quivering, into the water. His sharp eyes crinkled at the edges as he squinted into the bubbly green depths.
“Not caught over, little bro. Something’s caught in.”
“We only just threw it,” Castiel objected, but not very hard, because now he could feel it too. Years of knowing the song of the ropes, and even of the timbers under his knees when the boat had weight behind her. There was something tangled down there: not a school of fish, but a single living creature. And—
Whatever it was, it was big. And it was strong. And it was fighting.
“You had to tempt the sea,” Castiel grumbled, as they hauled, and strained, and grunted, and the little boat tipped perilously backward.