In the sea, an _______ number of beings can make light.
diminishing
around normal
astonishing
outrageous
But if the aim is to remain invisible, why do some creatures light up when they are touched, or when the water nearby is _________?
disturbed
wavy
hot
still
Why might it be useful for an organism to be bioluminescent?
for protection, to find prey, to attract a mate
As you ______, sunlight disappears.
fall
rise
ascend
descend
What is meant by the "burglar alarm" effect?
Organisms produce light, which attracts the predators of their predators. (Enemy of an enemy is a friend.)
The "Bahia Bioluminiscente" or "Bio Bay" is home to ________ dinoflagellates that light up when the water moves.
creatures
unique
limited amounts
countless
Jellyfish and swimming snails are ________, ghostlike creatures, almost impossible to see.
transparent
white
colourful
bioluminescent
The ocean becomes a perpetual twilight, blue disappears, the ocean is as black as the night sky. These _____ make light uniquely useful as a weapon or veil.
elements
characteristics
factors
situations
In the ocean's upper _____, where light penetrates, creatures need to blend in to survive.
layers
shelf
coral
waters
Fireflies can create light, ________ to attract mates on a warm summer night.
trying
dying
dimming
flashing
When surviving in the sea, there is almost nowhere to hide, so being _______ is very important.
blue
invisible
covered in coral
visible
What types of animals do you know that are bioluminescent?
fireflies, jellyfish, squid, some types of worms
Which animals are know for their bright colours or spectacular appearance?
chameleons, poison dart frogs, blue morpho butterfly, scarlet macaw, toucan, lionfish, mandrill
In what ways do you think the characteristics of brightness, shininess, or spectacular features help the animals?
They can help the animals survive through camouflage, or by scaring predators away.
Any life form that stands out is in danger of being spotted by _________.
mermaids
fishermen
predators
sharks