The Deep Sea Word Search

About this puzzle

Below about 200 meters, sunlight fades and the deep sea begins: cold, dark and under enormous pressure. This adult-pick list covers the places (abyss, trench, vents), the conditions (darkness, pressure), animals adapted to them (anglerfish, gulper eel, viperfish, giant squid) and the tools scientists use to explore (submersible, sonar). BIOLUMINESCENCE, at fifteen letters, spans the full width of the 15×15 grid in whatever direction it runs.

The default layout is Hard on a 15×15 grid. Easy, Medium and Hard each use their own checked layout of the same words, and every one can be printed in standard or large print on US Letter or A4.

Word notes

Anglerfish

Females carry a glowing lure on a spine above the mouth to attract prey in the dark.

Submersible

A small underwater vehicle used for deep exploration.

Sonar

Uses pulses of sound and their echoes to map the seafloor and find objects underwater.

Bioluminescence

Light made by living things, common in deep-sea animals.

Vent

Hydrothermal vents release hot, mineral-rich water; whole communities of animals live around them without sunlight.

Giant Squid

One of the largest invertebrates, reaching around twelve meters including its long tentacles; it was first filmed alive in the deep sea in 2012.

Hadal

The deepest ocean zone, found in trenches below about 6,000 meters.

Try this after the puzzle

Make a depth chart: draw a vertical line from the surface to the bottom of a trench and place the words where they belong — sonar on a ship, the fading light around 200 meters, vents and anglerfish deeper down, and HADAL at the very bottom. It turns an unusual vocabulary list into a clear mental picture.

All 14 words

Abyss · Trench · Anglerfish · Submersible · Sonar · Bioluminescence · Pressure · Vent · Giant Squid · Gulper Eel · Darkness · Hadal · Sediment · Viperfish