# Broadleaf Sea Lettuce (*Ulva lactuca*)

Broadleaf Sea Lettuce is a bright green sea plant that grows in oceans and is often found on beaches. It looks like a big, flat leaf and is fun to touch and explore!

- **Category:** [Plants](https://www.snappit.app/explore/categories/plant)
- **Rarity:** Common
- **Danger:** 1/5 · Very low
- **Habitat:** Coastal areas

![Broadleaf Sea Lettuce](https://commons.wikimedia.org/w/index.php?title=Special:Redirect/file/Sea_lettuce_in_Brofjorden_1_-_cropped.jpg&width=800)

Photo: W.carter, CC0 · [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Sea_lettuce_in_Brofjorden_1_-_cropped.jpg)

## Appearance

The Broadleaf Sea Lettuce is a vibrant, translucent green alga with thin, crinkly, wavy blades resembling ruffled salad leaves. It often forms large, sheet-like colonies attached by a small holdfast, distinguishing it from stringier or brown seaweeds.

## Taxonomy

- **Kingdom:** Plantae
- **Phylum:** Chlorophyta
- **Class:** Ulvophyceae
- **Order:** Ulvales
- **Family:** Ulvaceae
- **Genus:** Ulva

## Interesting facts

- Despite its name, it's not a true plant but an advanced type of green algae!
- It helps clean the ocean by soaking up extra nutrients like a giant aquatic sponge!
- Sea lettuce can grow so fast it sometimes forms 'green tides' visible from space!
- This seaweed can sometimes wash ashore in huge piles, creating stinky, bright green beaches!

## Special abilities

- **Super Sun-Siphon:** Broadleaf Sea Lettuce can capture sunlight efficiently even underwater to create its own food, just like land plants do.
- **Wave Weaver:** Its thin, flexible blades allow it to sway with strong ocean currents without tearing, helping it survive harsh coastal conditions.
- **Nutrient Magnet:** This alga can rapidly absorb dissolved nutrients directly from seawater, helping it grow quickly in various marine environments.

## Measurements & details

- **Height:** 10-40 cm
- **Edible:** Yes
- **Toxicity:** None
- **Lifecycle:** Perennial
- **Pollination Method:** Water

## Ecological connections

- **Eaten by:** [Common periwinkle](https://www.snappit.app/explore/common-periwinkle) (*Littorina littorea*) — Grazed by snails in tidal zones.
- **Eaten by:** Purple sea urchin (*Strongylocentrotus purpuratus*) — A primary food source for many sea urchins.
- **Shelter:** Seaweed amphipod (*Ampithoe valida*) — Provides camouflage and habitat for small invertebrates.

## Traits

- [Salt Tolerant](https://www.snappit.app/explore/traits/salt-tolerant): Salt tolerant plants can withstand and grow in conditions with elevated salinity levels in the soil or water.
- [Edible](https://www.snappit.app/explore/traits/edible): Edible plants are those parts of a plant that are considered safe for human consumption.
- [Rapid Growing](https://www.snappit.app/explore/traits/rapid-growing): Rapid growing plants exhibit accelerated growth rates, quickly increasing in size and biomass within a short period.
- [Coastal](https://www.snappit.app/explore/traits/coastal): Coastal habitats are dynamic environments located along the interface between land and sea, influenced by tides, waves, and saltwater.
- [Aquatic](https://www.snappit.app/explore/traits/aquatic): Aquatic habitats encompass environments where organisms live predominantly in water, including oceans, rivers, lakes, and wetlands.
- [Marine](https://www.snappit.app/explore/traits/marine): Marine habitats encompass all saltwater environments of the Earth's oceans, supporting an immense diversity of aquatic life.

## Collections

- [Plants](https://www.snappit.app/explore/collections/plants)

## Safety

**Danger:** 1/5 · Very low

Always wash your hands after touching sea plants, and don't eat anything you find without asking an adult.

## Frequently Asked Questions

### How to identify Broadleaf Sea Lettuce?

Start with the whole plant, then compare leaf arrangement, leaf edges, stems and any flowers or fruit. Opposite leaves grow in pairs; alternate leaves come one at a time along the stem. These details tell you far more together than a single green leaf does. Plant Identifier: upload a photo and compare the visible details.

### How tall is Broadleaf Sea Lettuce?

10-40 cm

### Is Broadleaf Sea Lettuce edible?

Yes

### Is Broadleaf Sea Lettuce toxic?

None

### What is Broadleaf Sea Lettuce's lifecycle?

Perennial

### How is Broadleaf Sea Lettuce pollinated?

Water

### Where is Broadleaf Sea Lettuce usually found?

Coastal areas

## Where to spot

- [Southampton Village Historic District](https://www.snappit.app/guides/places/southampton-village-historic-district) — New York, US · Historic District

## More Plants

- [white snakeroot](https://www.snappit.app/explore/white-snakeroot) (*Ageratina altissima*)
- [tree-of-heaven](https://www.snappit.app/explore/tree-of-heaven) (*Ailanthus altissima*)
- [western sword fern](https://www.snappit.app/explore/western-sword-fern) (*Polystichum munitum*)
- [common milkweed](https://www.snappit.app/explore/common-milkweed) (*Asclepias syriaca*)

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Source: [Broadleaf Sea Lettuce: Facts & Places to See — Snappit](https://www.snappit.app/explore/broadleaf-sea-lettuce)