Atlantic Halibut vs Summer Flounder
Hippoglossus hippoglossus compared with Paralichthys dentatus
Taxonomy & Classification
| Attribute | Atlantic Halibut | Summer Flounder |
|---|---|---|
| Scientific Name | Hippoglossus hippoglossus | Paralichthys dentatus |
| Order | Pleuronectiformes | Pleuronectiformes |
| Family | Pleuronectidae | Paralichthyidae |
| Conservation Status | Endangered | Least Concern |
Physical Traits
| Attribute | Atlantic Halibut | Summer Flounder |
|---|---|---|
| Max Length | 470.0 cm | 94.0 cm |
| Max Weight | 320.0 kg | 12.0 kg |
| Color | Eyed side is olive-brown to dark greenish-brown with mottled paler blotches providing camouflage; blind underside is pure white; lateral line distinctly arched over the pectoral fin. | Eyed side is brownish to gray-green with a mottled pattern of pale blotches; 12–14 distinct pale-edged dark ocelli (eyespots) scattered across the body; blind side is plain white; color changes with substrate. |
Habitat & Environment
| Attribute | Atlantic Halibut | Summer Flounder |
|---|---|---|
| Water Type | Saltwater | Saltwater |
| Depth Range | 50-2000m | 10-183m |
| Geographic Range | North Atlantic from Labrador and Greenland east to Iceland, Norway, the Barents Sea, and the British Isles. Found on sandy and gravel bottoms at depths … | Western North Atlantic from Nova Scotia south to Florida and the northern Gulf of Mexico. Undertakes seasonal offshore migration to deeper Continental Shelf waters in … |
| Habitat | Neritic | Neritic, demersal, estuaries |
Fishing Information
| Attribute | Atlantic Halibut | Summer Flounder |
|---|---|---|
| Game Fish | Yes | Yes |
| Fight Rating | 7/10 | 4/10 |
| World Record | — | — |
| Mercury Level | — | — |
Cuisine & Edibility
Atlantic Halibut
Firm, meaty white flesh with a mild, sweet flavor and very low fat. Endangered status — sustainable sourcing essential; superb pan-seared, poached in butter, or roasted with aromatics.
Summer Flounder
Thin, delicate white fillets with a sweet, mild flavor and very low fat. Prized on the U.S. East Coast; superb pan-fried in butter, stuffed and baked, or prepared as ceviche.
Species Overview
Atlantic Halibut
The Atlantic halibut is the largest flatfish in the world, capable of exceeding 300 kg. Both eyes are on the right side of its body. It is a slow-growing, long-lived species that has suffered severe overfishing.
Summer Flounder
The summer flounder, or fluke, is a flatfish that lies camouflaged on the ocean floor. Born with eyes on both sides, one eye migrates to the left side during development. An ambush predator, it explodes upward to grab passing prey.