Marine Ecosystems

Ocean biology from coral reefs to the deep sea — marine habitats, organisms, and the challenges facing our oceans.

Intermediate 15 guides
1

Introduction to Ocean Life

The diversity and importance of marine organisms

2 min read 384 words
2

Coral Reefs — Rainforests of the Sea

Coral biology reef ecology and threats

2 min read 400 words
3

Deep Sea Creatures

Life in the abyss — bioluminescence and extreme adaptations

2 min read 382 words
4

Whales and Marine Mammals

Cetaceans pinnipeds and sirenians

2 min read 378 words
5

Sharks and Rays

Ancient predators of the ocean

2 min read 374 words
6

Plankton and Microscopic Ocean Life

The tiny organisms that power ocean ecosystems

2 min read 390 words
7

Kelp Forests and Seagrass Meadows

Underwater plant ecosystems and their inhabitants

2 min read 388 words
8

Mangroves and Coastal Ecosystems

Where land meets sea — critical coastal habitats

2 min read 386 words
9

Ocean Zones and Habitats

From sunlit shallows to the hadal zone

2 min read 384 words
10

Marine Food Webs

Energy flow in ocean ecosystems

2 min read 374 words
11

Sea Turtles and Their Journeys

Migration nesting and conservation

2 min read 384 words
12

Octopus and Cephalopods

Intelligence camouflage and evolution

2 min read 372 words
13

Hydrothermal Vents — Life Without Sunlight

Chemosynthesis-based ecosystems in the deep ocean

2 min read 394 words
14

Ocean Pollution and Its Effects

Plastic microplastics and chemical contamination

2 min read 386 words
15

Protecting Marine Biodiversity

Marine protected areas and conservation strategies

2 min read 376 words