Aquatic and Marine Biology

Pythons are not poisonous. They kill by constriction, or by completely swallowing their prey.

Crabs are non-poisonous crustaceans.

Paddle like limbs are present in aquatic animals like ducks.

Gills are present in aquatic animals in place of lungs, it helps in the breathing process in the presence of water.

Whale breathes through the lungs, not through the gills.

Swim bladders are present in fish.

Sponges, worms, and molluscs all lack a vertebral column, placing them in the invertebrate category. Invertebrates constitute the vast majority of animal species.

Corals are sessile organisms, meaning they are fixed in place and do not move from that location. The other options (liver fluke, oysters, jellyfish, cockroaches) all have some form of locomotion.

Sea stars, sea urchins (misspelled as 'urchon'), and sand dollars are all echinoderms. They share characteristics including radial symmetry (usually five-part), a water vascular system, and tube feet. 'All of these' is the correct answer as all three listed organisms belong to the phylum Echinodermata.

Starfish belongs to the phylum Echinodermata, which has a water vascular system for locomotion, transportation of food and respiration.

Aves or birds have an oil gland at the base of the tail.

Sea horse or hippocampus is a bony fish.

Lissodendoryx colombiensis is found in collaboration with sea grass.

Female bottlenose dolphins in Shark Bay in Western Australia use sponge as a tool to attach when searching for food in the sandy sea-bottom.