"Balloonfish," answered Merla. "They are helpless creatures, but have little spikes all over them so their enemies dare not bite them for fear of getting pricked."
Trot found the balloonfish quite interesting. They had little dots of eyes and dots for mouths, but she could see no noses, and their fins and tails were very small.
"They catch these fish in the South Sea Islands and make lanterns of 'em," said Cap'n Bill. "They first skin 'em and sew the skin up again to let it dry, and then they put candles inside, and the light shines through the dried skin."
Many other curious sights they saw in the ocean that afternoon, and both Cap'n Bill and Trot thoroughly enjoyed their glimpse of sea life. At last Merla said it was time to return to the palace, from which she claimed they had not at any time been very far distant. "We must prepare for dinner, as it will soon begin to grow dark in the water," continued their conductor. So they swam leisurely back to the groves that surrounded the palaces, and as they entered the gardens the sun sank, and deep shadows began to form in the ocean depths.
CHAPTER 8
A BANQUET UNDER WATER
The palaces of the mermaids were all aglow with lights as they approached them, and Trot was amazed at the sight.
"Where do the lamps come from?" she asked their guide wonderingly.
"They are not lamps, my dear," replied Merla, much amused at this suggestion. "We use electric lights in our palaces and have done so for thousands of years—long before the earth people knew of electric lights."