Sponges are marine invertebrates with a jellylike mesohyl sandwiched between two layers of cells. Sponges are composed of a jellylike mesohyl sandwiched between two layers of cells. Ejaculate is jellylike and fails to liquefy. The eggs of fish and amphibians are jellylike. Their eggs are deposited in round or oval jellylike strings, attached to eelgrass or sand. The fluid within a ranula has the viscous, jellylike consistency of egg white.