No - its a plant.
fish
algae
Ascophyllum nodosum
Rockweed, a type of seaweed, is commonly found growing in the intertidal zone, which is the area that is covered by water during high tide and exposed during low tide. This allows rockweed to thrive in both submerged and exposed conditions as the tide fluctuates.
Bladderwrack is a Fucus Vesiculosus/algae. Bladderwrack is a common name for Rockweed.
It is some producer of Number 2 of course!!!!
invertebrate - has exoskeleton
An invertebrate.
Rockweed, scientifically known as Ascophyllum nodosum, is a type of brown seaweed commonly found along the Atlantic and Pacific coasts. It grows in intertidal zones and is characterized by its long, branching fronds and distinctive air bladders. Rockweed is ecologically significant, providing habitat and food for various marine organisms, and is also harvested for use in fertilizers, animal feed, and dietary supplements due to its rich nutrient content.
no
It is an invertebrate 
A bullfrog is not an invertebrate; it has a spine.