Remove the horn from the shrimp heads using a sharp knife or kitchen shears. Place the heads in a medium bowl and set aside.
Coat the Shrimp
Place the potato and corn starch mixture into a small bowl. Gently stir to incorporate them.
Pour the starch mixture over the shrimp heads and toss gently to coat them completely.
Fry The Shrimp
Heat your canola oil in a deep fryer or heavy-bottomed pot to around 375°F. The key is to fry in small batches to avoid cooling the oil too much, which leads to soggy shells.
Once the oil has preheated, carefully lower the coated heads into it. Fry for about 2-3 minutes, or until they turn golden and crispy. Remove with a slotted spoon and drain on paper towels.
Season immediately with salt and pepper.
Repeat with the remaining shrimp heads.
NOTES
Trim the horn first. Cut off the sharp rostrum before coating so the heads are easier and safer to eat.
Use a light starch coat. Toss the heads in a 50/50 mix of potato starch and cornstarch. A wet batter is the wrong move here because it can steam the shrimp heads and make them chewy instead of crisp.
Fry in small batches. Heat the oil to about 375 F and do not crowd the pot, or the oil temperature will drop and the shells can go soggy.
Cook until golden and crisp. Fry for about 2 to 3 minutes, just until the heads are crisp and lightly browned.
Season right away. Hit them with fine kosher salt and black or white pepper as soon as they come out of the oil so the seasoning sticks.
Serve them immediately. Drain briefly, then eat them hot while the shells are still crisp.