Cat Ba food is fresh seafood cooked simply, which means the meal lives or dies on how you order. Here are the dishes worth your appetite and the four-step routine that keeps the bill sane.
The short answer to what to eat in Cat Ba is whatever came out of the water that morning, cooked plainly. Eating here is simpler than people expect: the ingredients are fresh, the cooking is unfussy, and very little of it is elaborate. The flip side is that the quality of your dinner depends almost entirely on what you choose and how you ask about the price. Below are the dishes worth your appetite on a two or three day trip, roughly in the order I would try them, and the ordering routine that goes with them.
1. Tu hài, the one dish to try first
If you only remember one thing you ate on Cat Ba, it will be tu hài, a big clam farmed all around the island and often written as geoduck on English menus. The meat is crunchy and sweet in a way that is genuinely unlike other shellfish. The standard treatment is grilled in the half shell with scallion oil and crushed roasted peanuts, eaten straight off the grill. If you want the cleaner version, order it steamed with ginger or lemongrass so the juices stay in the shell. It is usually priced per piece, so ask what one costs before ordering a plateful.
2. Grouper and cobia from the floating pens
The bay is full of aquaculture rafts, so the fish here goes from pen to pan in minutes. Cá song, or grouper, steamed with soy sauce or dropped into a hotpot is the most common way to eat it, and the flesh is firm and clean tasting. Cá giò, cobia, suits hotpot or the grill. A medium fish feeds three or four people; ordering a large one usually means paying by the kilo for food you will not finish.
3. Mantis shrimp, crab and everything steamed
Bề bề, mantis shrimp, is at its best in the months when the roe is in, steamed with beer and peeled while still hot. For flower crab, choose animals that feel heavy for their size with a firm underside and all their claws attached. This is the category where bills go wrong most often, because prices swing hard with the season and the size, so always pick from the tray yourself and watch the scale.
- Crab: heavy in the hand, firm underside, claws intact
- Mantis shrimp: ask whether it has roe before agreeing a price
- Sea snails: cheap, good in the late afternoon, order a small plate rather than a big one
- Squid: fresh and steamed with ginger for dinner, sun-dried to take home
4. Horseshoe crab, the one to be careful with
Sam, horseshoe crab, is a specialty along the Hai Phong and Quang Ninh coast and turns up on Cat Ba in season, served as a salad, grilled or stir fried sweet and sour, with the roe treated as the prize. The flavor is strong and divides people, so order one portion for the table before committing. One safety point matters more than any of that: a similar-looking species is toxic and inexperienced cooks confuse them, so eat this only at a place that clearly prepares it regularly.
5. Breakfast: noodle soups and Hai Phong street food
Mornings on the island do not call for anything elaborate. A bowl of seafood noodle soup or clam rice porridge from a roadside stall does the job before you board a boat. Because Cat Ba is part of Hai Phong you will also find bánh đa cua, the city's crab noodle soup made with wide reddish-brown rice noodles, and bánh mì cay, a finger-thin baguette with pâté and chili paste whose name simply means spicy bread. Neither is quite as good here as in the city, but both are quick.
6. Eating on a floating fish farm
Several of the rafts around Cai Beo and out on the bay serve meals. You sit on a platform on the water, point at a pen, and they net whatever you pointed at. It costs more than eating on shore and you normally pay a boat fare to get out and back, but on a three-day trip it is worth one dinner. Ask for the total including the boat before you go, not after.
7. What to take home
- One-sun-dried squid and dried fish: easy to pack and they keep
- Dried shrimp and shrimp paste: good if you are buying gifts in quantity
- Forest honey: ask where it came from, and skip the stalls beside the beach
- Fresh seafood: only if you are traveling straight home the same day, packed in a foam box with ice
- Buy at the town market in the morning, where prices are visibly better than in the tourist stalls
What to eat on Cat Ba Island, and what a day of it costs
Seafood is sold by weight and by size, so the same dish can cost very different amounts depending on what you point at, but the shape of a day is predictable. Breakfast from a street stall, a bowl of seafood noodle soup or clam rice porridge, is the cheap end and leaves the rest of the day flexible. Lunch and a proper seafood dinner between them bring a full day of eating to somewhere around 300,000-500,000d per person (roughly US$12-20) as an estimate, and that assumes seafood at both. A meal out on a floating fish farm sits above that band, partly for the fish and partly for the boat fare to get out and back, so ask for the total including the boat before you set off rather than after. Prices climb on summer weekends and Vietnamese public holidays, when the island is full and the good tanks empty early. Carry cash in dong; the stalls, the market and the boats out to the rafts do not take cards.
Where and when to buy, rather than where to sit
Freshness on this island is a question of timing more than address. The catch lands early in the morning and again in the early evening, and those are the two windows when what is in the tank has not been sitting there. The town market in the morning is also where the dried goods are cheapest, visibly better value than the stalls beside the beaches, which price for people who have already changed into swimwear and are not going to walk back into town. If you want the floating fish farm meal, do it on an evening when you are not also trying to catch a boat or a bus the next morning, because the whole point is sitting on the water long enough for it to get dark.
There is one rule for eating seafood on this island: ask the price per kilo, pick your own animal, watch it weighed in front of you, and only then say how you want it cooked. Those four steps take under two minutes and they head off almost every overcharging story you will read online.
A few last things
- Do not order when you are starving; you will over-order and regret it
- A place with prices per kilo clearly posted is usually more trustworthy than one without
- Seafood is freshest early in the morning and early in the evening, when the catch lands
- In peak summer, eat before 6pm unless you enjoy waiting
- If your stomach is sensitive, go easy on raw salads and rare dishes on your first day
