---
title: "Ocean Food Webs"
description: "Understand ocean food webs: multiple interconnected food chains where energy flows from phytoplankton (producers) through zooplankton, small fish, and large predators, and that removing one species af"
canonical: https://lightmysky.com/learn/science/ocean-food-webs-mt_OnV_DTp5i8
source: https://lightmysky.com/learn/science/ocean-food-webs-mt_OnV_DTp5i8.md
retrieved: 2026-10-19
---

> **Agent view.** This is the Markdown twin of the page, for tools and assistants.
> When to use this site, and the call that answers each job: https://lightmysky.com/agent-instructions.md
> API description (OpenAPI 3.1): https://lightmysky.com/openapi.json · Authentication: https://lightmysky.com/auth.md
> Pricing: https://lightmysky.com/pricing.md · Catalog: https://lightmysky.com/llms.txt · Full catalog: https://lightmysky.com/llms-full.txt
> Every machine-readable file on this domain: https://lightmysky.com/.well-known/ai-catalog.json
> Ask for Markdown with `Accept: text/markdown`, a `.md` address, or `?mode=agent`.

# Ocean Food Webs

Understand ocean food webs: multiple interconnected food chains where energy flows from phytoplankton (producers) through zooplankton, small fish, and large predators, and that removing one species affects the whole web

Subject: Science · Area: Ocean Life · Ages 7 to 9
Page: https://lightmysky.com/learn/science/ocean-food-webs-mt_OnV_DTp5i8

## Ready when they can

- Distinguish a food web from a simple food chain
- Trace at least two paths of energy through an ocean food web
- Explain what could happen if one species in the web were removed

## Lesson: Ocean Food Webs

You already know a food chain: one line where energy moves from one living thing to the next, like algae to a small fish to a big fish. In the real ocean, most animals eat more than one kind of food, and get eaten by more than one kind of animal. Connect all those chains together and you get a food web.

*(drawing: One path through the web: algae make food from sunlight, zooplankton eat the algae, small fish eat the zooplankton, and tuna eat the small fish.)*

**Example.** Mia looks at the same food web and finds a second path. This time, small fish get eaten by a shark instead of a tuna. Both paths start at the algae, but they end differently. That crossing is what makes it a web instead of a single chain.

**Tip.** If people catch too many small fish, tuna and sharks lose part of their food, and zooplankton have fewer hunters, so their numbers can grow too fast. Removing just one kind of animal can shift the whole web, not only its own chain.

**Recap.** A food web links many ocean food chains together, so changing one species can change the whole web.

## Practice

8 questions on this page, each with its working shown.

## Needs first

- [Classifying Ocean Animals](https://lightmysky.com/learn/science/classifying-ocean-animals-mt__aHSZTm5k5)
- [Ocean Food Chains](https://lightmysky.com/learn/science/ocean-food-chains-mt_l6OpmOKMuT)

## Opens up

- [Ocean Pollution & Harm](https://lightmysky.com/learn/science/ocean-pollution-and-harm-mt_J6uccv2Bo4)
- [Food Chains & Energy Transfer](https://lightmysky.com/learn/science/food-chains-and-energy-transfer-mt_oB-L8EVdIP)
- [Ocean animal migrations](https://lightmysky.com/learn/science/ocean-animal-migrations-mt_Te-ulgYMUd)
- [Ocean Ecosystems](https://lightmysky.com/learn/science/ocean-ecosystems-mt_w4OYcWJs6H)