Hotel restaurants have a reputation problem. Too often they're uninspired, overpriced, and dependent on captive guests who don't know better.
Seahorse at the W Union Square is none of those things.
This is a legitimate destination restaurant that happens to be in a hotel. Rockwell Group designed a stunning space. Chef Michael White protégé Amanda Cohen leads the kitchen. And the result is a seafood brasserie that locals actually want to visit.
Let's break down why Seahorse is worth your time.
What Makes Seahorse Different
Hotel restaurants usually play it safe. Seahorse does not.
The team behind it includes restaurant veterans who've opened successful standalone spots. They approached this like any serious restaurant opening, not a hotel amenity.
The 120-seat space features soaring ceilings, nautical-but-not-cheesy design elements, and an open kitchen that anchors the room. There's a massive raw bar up front, a dessert cart that roams the dining room, and an energy level that makes you forget you're in a hotel lobby.
It feels like a classic New York brasserie, the kind of place you could imagine existing for decades. Which is exactly the point.
The Rockwell Group Design
David Rockwell's firm has designed some of NYC's most beautiful restaurants. Seahorse ranks among their best work.
The color palette is aquatic without being literal. Deep blues, seafoam greens, and brass accents create a sophisticated coastal vibe. Custom tilework, curved banquettes, and thoughtful lighting make every table feel special.
The raw bar is positioned prominently near the entrance, with fresh seafood displayed on ice. The open kitchen sits at the back, providing theater without noise or heat.
And those curved banquettes? They're as comfortable as they are photogenic. You could spend hours here.
The Menu: French Brasserie Meets American Seafood
Chef Amanda Cohen trained under Michael White at Marea, and it shows. Her cooking is refined but not fussy, focused on pristine ingredients prepared simply.
The menu reads like a greatest hits of brasserie seafood, with creative touches that keep things interesting.
Raw Bar Highlights
Oysters - Six selections daily from both coasts, all perfectly fresh and properly shucked. The half-dozen format encourages trying multiple varieties.
Shellfish Plateau - Tiered towers of oysters, clams, shrimp, crab, and lobster. Available in multiple sizes ($75 to $185). This is the Instagram move, but it also tastes fantastic.
Tuna Tartare - Diced yellowfin with avocado, soy-ginger dressing, and crispy wontons. It's been on every upscale menu since 1998, but Cohen's version is perfectly balanced.
Lobster Cocktail - Poached lobster tail, served chilled with cocktail sauce and lemon. Simple, classic, and a reminder that sometimes the old ways are best.
Starters and Small Plates
Crispy Calamari - Lightly fried squid with cherry peppers and preserved lemon aioli. The squid is tender, the coating is shatteringly crisp, and those peppers add just enough heat.
Burrata with Heirloom Tomatoes - When tomatoes are in season, this dish sings. Creamy burrata, perfectly ripe tomatoes, basil oil, and sea salt. Sometimes simple is best.
French Onion Soup - A brasserie staple done right. Rich beef broth, caramelized onions, a thick layer of Gruyère that stretches as you lift your spoon.
Escargot Persillade - Snails baked in garlic-parsley butter, served with toasted baguette for soaking up every drop of that butter.
Main Courses
Spicy Lobster Cavatelli - This is the signature dish, and for good reason. House-made cavatelli tossed with chunks of lobster, cherry tomatoes, garlic, chili flakes, and white wine. It's rich, spicy, and absolutely crave-worthy.
Whole Roasted Branzino - A full Mediterranean sea bass, roasted with lemon, herbs, and olive oil, filleted tableside. The fish is moist and flaky, the presentation is impressive, and it easily feeds two.
Dover Sole Meunière - Classic preparation of this delicate fish. Filleted tableside, finished with brown butter, lemon, and capers. It's expensive ($68) but worth it for a special occasion.
Bouillabaisse - A proper French fish stew with mussels, clams, shrimp, and fish in a saffron-scented tomato broth. Served with rouille and grilled bread. This is deeply flavorful and satisfying.
Steak Frites - Not seafood, but sometimes you want steak. The 12-ounce strip is grilled perfectly, served with excellent fries and herb butter. Solid execution of a brasserie classic.
Chicken Under a Brick - Half a chicken, pressed and roasted until the skin is golden and crispy. Served with roasted vegetables and jus. The best non-seafood option on the menu.
The Famous Dessert Cart
Seahorse brings back the roaming dessert cart, and it's glorious.
The cart arrives at your table loaded with options: chocolate mousse cake, lemon tart, crème brûlée, profiteroles, tarte Tatin, and more. Everything is house-made and beautifully presented.
Your server will describe each dessert, and you can order one (or several). Portions are generous, and the execution is consistently excellent.
The chocolate mousse cake is particularly good, with layers of dark chocolate mousse and hazelnut praline. But honestly, everything on that cart is worth trying.
The Bar and Cocktail Program
Seahorse's bar program leans into classic cocktails with seafood-friendly twists.
The Seahorse Martini (gin, dry vermouth, olive brine, anchovy-stuffed olives) is polarizing but worth trying. The French 75 is perfectly balanced. And the Negroni Sbagliato is dangerously drinkable.
Wine service focuses on French and American bottles, with particular strength in white wines that pair well with seafood. Most bottles range from $60 to $150, with solid by-the-glass options from $14 to $22.
The bar itself is a great spot for solo diners or pre-dinner drinks. Knowledgeable bartenders, excellent snacks, and a lively but not overwhelming scene.
The Atmosphere and Scene
Seahorse occupies an interesting space: it's polished enough for special occasions but relaxed enough for a casual dinner.
You'll see hotel guests, sure. But you'll also see locals celebrating anniversaries, business dinners, and groups of friends who just love good seafood.
The noise level hovers around "buzzy." You can hold a conversation without shouting, but you'll feel the energy. It's the kind of place that feels alive.
Service is polished and professional. Servers know the menu, offer genuine recommendations, and time courses appropriately. It feels like a restaurant where the staff actually cares.
Getting a Reservation
Here's the pleasant surprise: Seahorse is bookable.
They use OpenTable and maintain good availability, even on weekends. Prime Friday and Saturday slots (7:00 PM to 8:30 PM) book up, but you usually have a week or two to plan.
Booking Strategy
Book a week or two out - You rarely need to scramble for a last-minute table. Even weekend reservations are typically available with moderate advance planning.
Walk-ins work - The bar area takes walk-ins, and the host stand can often seat parties of two with a short wait, especially on weeknights.
Large parties should call ahead - For groups of 6+, call the restaurant directly. They have space for larger parties and prefer to coordinate details by phone.
Practical Details
Location: 201 Park Avenue South (at East 17th Street), New York, NY 10003
Hours: Breakfast daily 7:00 AM to 11:00 AM, Lunch Monday through Friday 11:30 AM to 3:00 PM, Dinner daily 5:00 PM to 10:30 PM, Late-Night menu until midnight.
Price Range: Raw bar $4 to $185, starters $16 to $28, mains $32 to $68, desserts $12 to $14. Expect $95 to $130 per person with wine.
Dress Code: Smart casual. Step it up from daytime casual, but suits aren't necessary.
Reservations: OpenTable, with good availability.
Vibe: Polished brasserie elegance with lively energy.
How to Order at Seahorse
For your first visit, here's the move:
Start with oysters or the tuna tartare. If you're with a group, the shellfish plateau makes a statement.
Order the spicy lobster cavatelli. This is non-negotiable. It's the dish that made Seahorse famous, and it lives up to the hype.
Add a whole fish if you're sharing (the branzino is excellent), or go with the bouillabaisse if you want something rich and satisfying.
Save room for the dessert cart. Get the chocolate mousse cake or the lemon tart, or split something with your dining companion.
Let your server guide wine pairings. The staff knows what works with seafood.
Insider Tips
The bar is underrated - Great for solo dining or drinks before dinner. Full menu available, and bartenders know their stuff.
Late-night menu is a scene - After 10:30 PM, they offer a limited late-night menu. It's when the restaurant industry comes to eat, and the vibe shifts from dinner service to hang-out mode.
Lunch is a deal - Weekday lunch offers many of the same dishes at lower prices. Great option if you want to try Seahorse without dinner prices.
Hotel guests get breakfast - If you're staying at the W, breakfast at Seahorse is included. It's actually good hotel breakfast, not just continental buffet.
The dessert cart is shareable - Portions are generous. One dessert for two people is plenty, especially after a full meal.
Is Seahorse Worth Visiting?
If you're looking for a polished seafood brasserie with excellent cooking, a beautiful space, and reasonable availability, absolutely yes.
Seahorse proves that hotel restaurants can compete with standalone spots when they're done right. The food is legitimately good, the space is gorgeous, and the whole experience feels special without being stuffy.
Is it the most cutting-edge restaurant in NYC? No. But it doesn't try to be. It's a well-executed brasserie serving excellent seafood in a room designed for celebration and conversation.
Sometimes that's exactly what you need.
Alternatives If You Want Different Vibes
Looking for other seafood options in the area? Consider:
Gramercy Tavern - More New American than brasserie, but excellent seafood and a Union Square classic.
Le Bernardin - If you want the pinnacle of NYC seafood and don't mind Midtown or high prices.
Cull & Pistol - Chelsea seafood spot with a more casual, oyster bar focused vibe.
FAQ
How do I get a reservation at Seahorse?
Book on OpenTable. Seahorse maintains good availability, even on weekends. Reserve a week or two in advance for weekend prime times. Walk-ins are also viable, especially for the bar area.
Can you walk into Seahorse without a reservation?
Yes. The bar area accepts walk-ins, and the host stand can often seat parties of two with minimal wait, especially on weeknights. Weekend walk-ins have a longer wait but are possible.
What should I wear to Seahorse?
Smart casual. Nice jeans or slacks with a button-down or blouse. It's polished but not overly formal. Avoid gym clothes and very casual attire.
How much does dinner cost at Seahorse?
Expect $95 to $130 per person with wine. Raw bar items are $4 to $185 (plateaus), starters $16 to $28, mains $32 to $68. Wine by the glass runs $14 to $22.
What is the signature dish at Seahorse?
Spicy lobster cavatelli. House-made pasta with chunks of lobster, cherry tomatoes, garlic, chili flakes, and white wine. It's the dish everyone orders, and it's absolutely worth it.
Is Seahorse a good hotel restaurant or a good restaurant?
It's a legitimately good restaurant that happens to be in a hotel. The cooking, service, and design all stand on their own merits. Locals eat here regularly.
Is Seahorse good for special occasions?
Very. The Rockwell Group design is beautiful, the dessert cart adds theater, and the service is polished. Perfect for anniversaries, birthdays, or celebrations.
Is the dessert cart worth it?
Absolutely. Everything is house-made and beautifully presented. The chocolate mousse cake is particularly excellent. Don't skip this experience.
