What reading level is On the coral reefs?

On the coral reefs by Sneed B. Collard is at a Level 7-8 reading level. Recommended for Middle Grades readers (Ages 9-12).

What age is On the coral reefs appropriate for?

On the coral reefs is recommended for Ages 9-12. HootRating: 12C (Clear).

What genre is On the coral reefs?

On the coral reefs is nonfiction — Juvenile Nonfiction. Part of the Science Adventures (Marshall Cavendish) series.

Does On the coral reefs have any content warnings?

On the coral reefs has a HootRating of 12C (Clear). No specific content flags noted. On HootRated, every book is rated across four dimensions — emotional, physical, social, and thematic — to help parents make informed choices.

How many pages is On the coral reefs?

On the coral reefs by Sneed B. Collard is 54 pages (approximately 5,506 words).

Reviewed by HootRated editorial · Last updated May 18, 2026

On the coral reefs

Sneed B. Collard

On the coral reefs

Age Rating, Reading Level & Content Guide

by Sneed B. Collard

Science Adventures (Marshall Cavendish)

Reading Level 7-8 12C Ages 9-12 Sweet Spot Page-Turner

The text is written at a 7th grade reading level, the subject matter is intended for middle graders (ages 9–12), and the content is gentle with no concerning themes.

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About This Book

Dive into the vibrant world beneath the waves, where Dr. Alexander Grutter and his team explore the fascinating connections that keep coral reefs alive and thriving. Discover how these underwater ecosystems work together in a colorful and lively environment full of surprises. Perfect for young readers eager to learn about marine science and the wonders of coral reefs.

Themes

Science & Nature Adventure

Quick Assessment

This is a Level 7-8 book with gentle content intensity. It's a Sweet Spot read — challenging text with gentle themes, ideal for advanced or 2e readers. No notable content concerns flagged. Written for readers ages 9-12.

Why we rated On the coral reefs 12C

On the coral reefs is written at a Level 7-8 reading level across 54 pages (approximately 5,506 words). Strong independent readers around grade 8.5 can typically handle this book on their own; with parent or teacher support, On the coral reefs works for readers up to grade 9.5.

Read aloud, On the coral reefs takes about 37 minutes, which fits within a single read-aloud session.

We rate On the coral reefs as 12C ("Clear") because the content sits in the "Gentle" range — no conflict beyond everyday childhood experiences. Across our four dimensions (emotional, physical, social, thematic) the book reads as evenly gentle; no single dimension stands out as a concern.

No specific content flags were raised by community reviewers, which is consistent with the gentle intensity score.

Thematically, On the coral reefs weaves together science & nature and adventure.

Good fit for

✓ Children in the Ages 9-12 range — the maturity and attention span match the story's pacing.
✓ Reluctant readers who need fast-paced, hook-heavy stories to stay engaged.
✓ Kids drawn to stories about science & nature, adventure.
✓ Readers who fall hard for one book and want a long series to live in — there are 3 more books in the Science Adventures (Marshall Cavendish) series.
✓ Curious kids who prefer real-world topics over made-up stories.

Maybe not for

! Readers whose emotional readiness lags behind their decoding skills — this book's intensity outruns its reading level, a classic "gifted kid" mismatch.