The title is metaphorical – the “death” symbolises the speaker’s loss of innocence as he grows up.
The tone of the poem at the beginning is almost enthusiastic –the verbs “sweltered”, “festered” and “gargled” suggest the speaker is almost relishing the vile smells of the dam.
Language such as "jampotfuls", "fattening dots" and "mammy frog" suggest childhoodinnocence.
The tone changes on "Then one hot day" and the tone becomes more aware of the dangers "angry frogs".
"Spawn would clutch it" shows the contrast with when he would collect the "jellied specks"- he has grownup and no longer wants to play the games of his childhood.